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1-48 of 77 results for "aquarium PH & Alkalinity additive"

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Compared to alternative products for this search, products highlighted as 'Overall Pick' are, on average:
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Tetra Correct pH Tablets 8 Count, For aquarium Water

Tetra Correct pH Tablets 8 Count, For aquarium Water

4.5 out of 5 stars
3,158
1K+ bought in past month
$3.99$3.99
List: $4.19$4.19
Save 5% on 4 select item(s)
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Or fastest delivery Mon, Apr 1
Brightwell Aquatics Alkalin8.3-P - Alkaline KH Buffer Powder for All Marine and Reef Aquariums

Brightwell Aquatics Alkalin8.3-P - Alkaline KH Buffer Powder for All Marine and Reef Aquariums

4.6 out of 5 stars
74
$20.69$20.69
Typical: $24.42$24.42
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
More Buying Choices
$14.20(5 new offers)
API PROPER pH 7.0 Freshwater Aquarium Water pH Stabilizer 8.8-Ounce Container

API PROPER pH 7.0 Freshwater Aquarium Water pH Stabilizer 8.8-Ounce Container

4.5 out of 5 stars
2,366
900+ bought in past month
$10.98$10.98
List: $15.78$15.78
$10.43 with Subscribe & Save discount
$2.04 coupon applied at checkoutSave $2.04 with coupon
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
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Brightwell Aquatics pH+, pH Increaser for All Marine and Freshwater Aquariums - 125 ml

Brightwell Aquatics pH+, pH Increaser for All Marine and Freshwater Aquariums - 125 ml

4.3 out of 5 stars
127
$7.06$7.06
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Brightwell Aquatics Alkalin8.3 - Concentrated KH Buffer Supplement for All Marine and Reef Aquariums

Brightwell Aquatics Alkalin8.3 - Concentrated KH Buffer Supplement for All Marine and Reef Aquariums

4.7 out of 5 stars
127
$31.81$31.81
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Only 9 left in stock (more on the way).
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$27.22(3 new offers)
Brightwell Aquatics Reef Code A - Balanced Calcium and Alkalinity System for Marine Fish & Reef Aquariums 250-ml

Brightwell Aquatics Reef Code A - Balanced Calcium and Alkalinity System for Marine Fish & Reef Aquariums 250-ml

4.6 out of 5 stars
234
$11.25$11.25
FREE delivery on $35 shipped by Amazon.
Alkaline Buffer, 300 g / 10.5 oz

Alkaline Buffer, 300 g / 10.5 oz

4.7 out of 5 stars
1,161
300+ bought in past month
$12.09$12.09
List: $13.58$13.58
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
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$12.05(16 new offers)
Fluval Sea Alkalinity for Aquarium, 8-Ounce

Fluval Sea Alkalinity for Aquarium, 8-Ounce

4.4 out of 5 stars
113
50+ bought in past month
$3.79$3.79
List: $7.99$7.99
$3.60 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Tetra EasyBalance Plus 3.38 Ounces, Weekly Freshwater Aquarium Water Conditioner (836135)

Tetra EasyBalance Plus 3.38 Ounces, Weekly Freshwater Aquarium Water Conditioner (836135)

4.5 out of 5 stars
1,470
100+ bought in past month
$6.00$6.00
List: $7.04$7.04
$5.70 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
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Seachem Reef Carbonate 500ml

Seachem Reef Carbonate 500ml

4.7 out of 5 stars
342
100+ bought in past month
$6.87$6.87
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Reef Carbonate, 2 L / 67.6 fl. oz.

Reef Carbonate, 2 L / 67.6 fl. oz.

4.6 out of 5 stars
67
$25.15$25.15
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Continuum Aquatics Flora-Viv KH+ - Professional Alkalinity Boosting KH & pH stabilizer for All Freshwater & Planted Aquari...

Continuum Aquatics Flora-Viv KH+ - Professional Alkalinity Boosting KH & pH stabilizer for All Freshwater & Planted Aquariums, 500g

4.2 out of 5 stars
79
$17.33$17.33
Typical: $18.42$18.42
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
API pH UP Freshwater Aquarium Water pH Raising Solution for fish,4-Ounce Bottle

API pH UP Freshwater Aquarium Water pH Raising Solution for fish,4-Ounce Bottle

4.5 out of 5 stars
2,337
800+ bought in past month
$7.08$7.08 ($1.77$1.77/Fl Oz)
List: $9.88$9.88
$6.73 with Subscribe & Save discount
Save 5% on 4 select item(s)
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Best Sellerin Aquarium Water Treatments
Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml

Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml

4.8 out of 5 stars
35,199
6K+ bought in past month
$18.49$18.49 ($18.49$18.49/Count)
List: $21.40$21.40
Save more with Subscribe & Save
$3.70 coupon applied at checkoutSave $3.70 with coupon
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
More Buying Choices
$18.48(21 new offers)
KORDON #35316 pH Increase Adjuster for Aquarium, 16-Ounce

KORDON #35316 pH Increase Adjuster for Aquarium, 16-Ounce

4.4 out of 5 stars
384
300+ bought in past month
$7.02$7.02
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Seachem Alkaline Regulator 250gram

Seachem Alkaline Regulator 250gram

4.5 out of 5 stars
96
50+ bought in past month
$13.19$13.19
List: $16.27$16.27
$12.53 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle

API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle

4.6 out of 5 stars
747
100+ bought in past month
$8.38$8.38
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Or fastest delivery Wed, Apr 3
More Buying Choices
$5.88(5 new offers)
API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container

API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container

4.4 out of 5 stars
231
50+ bought in past month
$10.98$10.98
List: $15.78$15.78
$10.43 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
KORDON #35326 pH Decrease Adjuster for Aquarium, 16-Ounce

KORDON #35326 pH Decrease Adjuster for Aquarium, 16-Ounce

4.1 out of 5 stars
241
300+ bought in past month
$7.26$7.26
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Seachem Alkaline Buffer 600gram

Seachem Alkaline Buffer 600gram

4.7 out of 5 stars
512
100+ bought in past month
$16.99$16.99
$16.14 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Seachem Reef Buffer 250gram

Seachem Reef Buffer 250gram

4.7 out of 5 stars
550
50+ bought in past month
$7.12$7.12
Save more with Subscribe & Save
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Seachem Acid Buffer 300gram

Seachem Acid Buffer 300gram

4.7 out of 5 stars
683
200+ bought in past month
$12.32$12.32
List: $15.86$15.86
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
More Buying Choices
$11.50(16 new offers)
API PROPER pH 8.2 Freshwater Aquarium Water pH Stabilizer 7.4-Ounce Container

API PROPER pH 8.2 Freshwater Aquarium Water pH Stabilizer 7.4-Ounce Container

4.5 out of 5 stars
674
200+ bought in past month
$10.98$10.98
$10.43 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
KORDON #35314 pH Increase Adjuster for Aquarium, 4-Ounce

KORDON #35314 pH Increase Adjuster for Aquarium, 4-Ounce

3.8 out of 5 stars
7
$6.33$6.33
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Fritz Aquatics 81104 Fritz pH Higher for Fresh and Salt Water Aquariums, 16-Ounce

Fritz Aquatics 81104 Fritz pH Higher for Fresh and Salt Water Aquariums, 16-Ounce

4.1 out of 5 stars
154
$15.99$15.99
FREE delivery Fri, Apr 5
Or fastest delivery Apr 3 - 4
Only 10 left in stock - order soon.
Imagitarium pH Reducer, 4oz

Imagitarium pH Reducer, 4oz

4.9 out of 5 stars
12
$7.99$7.99 ($7.99$7.99/Count)
FREE delivery Apr 4 - 10
Or fastest delivery Apr 2 - 4
Only 20 left in stock - order soon.
Fluval Sea Alkalinity for Aquarium, 16-Ounce

Fluval Sea Alkalinity for Aquarium, 16-Ounce

4.7 out of 5 stars
6
$19.99$19.99
FREE delivery Fri, Apr 5
Only 2 left in stock - order soon.
Tetra Correct pH Tablets - 24 Tablets Total (3 Packs with 8 Tablets per Pack)

Tetra Correct pH Tablets - 24 Tablets Total (3 Packs with 8 Tablets per Pack)

4.6 out of 5 stars
303
50+ bought in past month
$12.64$12.64
List: $17.99$17.99
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Only 6 left in stock - order soon.
Continuum Aquatics Reef Basis KH Buffer – Professional Alkalinity Boosting pH & KH Buffer Powder for Marine Saltwater Fish...

Continuum Aquatics Reef Basis KH Buffer – Professional Alkalinity Boosting pH & KH Buffer Powder for Marine Saltwater Fish and Reef Aquariums

4.9 out of 5 stars
14
$10.82$10.82
FREE delivery Mon, Apr 8 on $35 of items shipped by Amazon
Or fastest delivery Thu, Apr 4
Brightwell Aquatics Florin pH- - Water Conditioner to Lower pH Level in Freshwater, Planted, and Marine Saltwater Aquarium...

Brightwell Aquatics Florin pH- - Water Conditioner to Lower pH Level in Freshwater, Planted, and Marine Saltwater Aquariums, 500-ml

3.2 out of 5 stars
5
$15.26$15.26
Save more with Subscribe & Save
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Only 2 left in stock - order soon.
Seachem Neutral Regulator 250gram

Seachem Neutral Regulator 250gram

4.6 out of 5 stars
2,025
600+ bought in past month
$7.24$7.24
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Fritz Aquatics 80301 Fritz RPM Alkalinity Buffer Reef Aquarium Supplement PT 1, 32-Ounce

Fritz Aquatics 80301 Fritz RPM Alkalinity Buffer Reef Aquarium Supplement PT 1, 32-Ounce

4.5 out of 5 stars
68
$15.46$15.46
FREE delivery Apr 3 - 5
Or fastest delivery Apr 1 - 2
Only 5 left in stock - order soon.
API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit (29A)

API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit (29A)

4.6 out of 5 stars
774
300+ bought in past month
$12.33$12.33 ($12.33$12.33/Count)
List: $18.28$18.28
Save more with Subscribe & Save
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Or fastest delivery Wed, Apr 3
Brightwell Aquatics Florin Delta KH+ - Increases Carbonate Hardness and pH Stability in Freshwater and Planted Aquariums 5...

Brightwell Aquatics Florin Delta KH+ - Increases Carbonate Hardness and pH Stability in Freshwater and Planted Aquariums 500-g

4.1 out of 5 stars
17
$18.83$18.83
Save more with Subscribe & Save
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Only 11 left in stock - order soon.
API pH DOWN Freshwater Aquarium Water pH Reducing Solution 1.25-Ounce Bottle

API pH DOWN Freshwater Aquarium Water pH Reducing Solution 1.25-Ounce Bottle

4.3 out of 5 stars
231
50+ bought in past month
$8.42$8.42 ($6.74$6.74/Fl Oz)
List: $10.99$10.99
FREE delivery Apr 4 - 5
Only 7 left in stock - order soon.
More Buying Choices
$7.51(6 new offers)
API Proper pH 7.5 Freshwater Aquarium Water pH Stabilizer 9.2-Ounce Container, Proper PH 7.5 PWDR JAR-Small, Whites & Tan...

API Proper pH 7.5 Freshwater Aquarium Water pH Stabilizer 9.2-Ounce Container, Proper PH 7.5 PWDR JAR-Small, Whites & Tans, 260 Grams

4.3 out of 5 stars
579
200+ bought in past month
$13.92$13.92
List: $15.78$15.78
$13.22 with Subscribe & Save discount
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Seachem MultiTest - Marine pH/Alkalinity - 75 Tests

Seachem MultiTest - Marine pH/Alkalinity - 75 Tests

3.7 out of 5 stars
23
$17.49$17.49
FREE delivery Fri, Apr 5
Or fastest delivery Apr 3 - 4
Only 8 left in stock - order soon.
More Buying Choices
$16.31(8 new offers)
API Perfect Start Complete Aquarium Start Up Program Additive, 1 Count (Pack of 1)

API Perfect Start Complete Aquarium Start Up Program Additive, 1 Count (Pack of 1)

4.4 out of 5 stars
150
$18.40$18.40
Typical: $19.36$19.36
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
More Buying Choices
$17.99(2 new offers)
Seachem Ph Alert for Freshwater

Seachem Ph Alert for Freshwater

3.8 out of 5 stars
165
$10.83$10.83
$10.29 with Subscribe & Save discount
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Only 2 left in stock - order soon.
Imagitarium pH Enhancer, 4oz

Imagitarium pH Enhancer, 4oz

4.7 out of 5 stars
7
$7.99$7.99 ($7.99$7.99/Count)
FREE delivery Apr 4 - 5
Red Sea Aqcult 306168 1 LTR Reefer Foundation B Alkalin

Red Sea Aqcult 306168 1 LTR Reefer Foundation B Alkalin

4.7 out of 5 stars
252
200+ bought in past month
$27.49$27.49
List: $32.82$32.82
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Only 9 left in stock - order soon.
Mars Fishcare North America Ph Up Bottle Water Conditioner Size: 16 oz.

Mars Fishcare North America Ph Up Bottle Water Conditioner Size: 16 oz.

4.5 out of 5 stars
182
$19.48$19.48
$18.67 with Subscribe & Save discount
FREE delivery Thu, Apr 4 on $35 of items shipped by Amazon
Or fastest delivery Wed, Apr 3
ESV Aquatics Bionic Part 1 Treatment, Alkalinity

Bionic Part 1 Treatment, Alkalinity

4.0 out of 5 stars
39
$25.59$25.59
Save more with Subscribe & Save
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Seachem 2 Pack of Alkaline Buffer, 600 Gram

Seachem 2 Pack of Alkaline Buffer, 600 Gram

5.0 out of 5 stars
2
$35.00$35.00
FREE delivery Apr 2 - 4
Or fastest delivery Tue, Apr 2
Only 2 left in stock - order soon.
More Buying Choices
$32.53(5 new offers)
API Proper pH 7.0 Freshwater Aquarium Water pH Stabilizer and API Stress Coat Aquarium Water Conditioner

API Proper pH 7.0 Freshwater Aquarium Water pH Stabilizer and API Stress Coat Aquarium Water Conditioner

5.0 out of 5 stars
1
$21.47$21.47
List: $31.16$31.16
FREE delivery on $35 shipped by Amazon.
Fritz Aquatics 80285 Fritz pH Neutralizer for Fresh and Salt Water Aquariums, 1-LBS

Fritz Aquatics 80285 Fritz pH Neutralizer for Fresh and Salt Water Aquariums, 1-LBS

4.4 out of 5 stars
126
$24.99$24.99
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
Only 2 left in stock - order soon.
Brightwell Aquatics Alkalin8.3 - Liquid pH Buffer & Alkalinity (KH) - Builder 250mL / 8.5oz

Brightwell Aquatics Alkalin8.3 - Liquid pH Buffer & Alkalinity (KH) - Builder 250mL / 8.5oz

5.0 out of 5 stars
3
$12.45$12.45
FREE delivery Apr 5 - 9
Only 3 left in stock - order soon.
More Buying Choices
$11.99(5 new offers)
Fluval 3 Ions Fluval Sea Trace for Aquarium, 8-Ounce

Fluval 3 Ions Fluval Sea Trace for Aquarium, 8-Ounce

4.6 out of 5 stars
68
$8.27$8.27
List: $11.99$11.99
FREE delivery Wed, Apr 3 on $35 of items shipped by Amazon
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