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1-48 of 76 results for
"aquarium PH & Alkalinity additive"
Results
Price and other details may vary based on product size and color.
Overall Pick
Amazon's Choice: Overall Pick
Compared to alternative products for this search, products highlighted as 'Overall Pick' are, on average:
Rated higher
Purchased more often
Delivered more quickly
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
Tue, Mar 26
on $35 of items shipped by Amazon
Only 9 left in stock (more on the way).
More Buying Choices
$27.22
(3 new offers)
Brightwell Aquatics Alkalin8.3-P - Alkaline KH Buffer Powder for All Marine and Reef Aquariums
4.6 out of 5 stars
74
$21.74
$
21
.
74
Typical:
$24.41
$24.41
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$14.20
(5 new offers)
Tetra Correct pH Tablets 8 Count, For aquarium Water
4.5 out of 5 stars
3,153
1K+ bought in past month
$3.99
$
3
.
99
List:
$4.19
$4.19
Save 5% on 4 select item(s)
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More results
API PROPER pH 7.0 Freshwater Aquarium Water pH Stabilizer 8.8-Ounce Container
4.5 out of 5 stars
2,361
1K+ bought in past month
$10.98
$
10
.
98
List:
$15.78
$15.78
$10.43 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Brightwell Aquatics pH+, pH Increaser for All Marine and Freshwater Aquariums - 125 ml
4.3 out of 5 stars
126
$7.06
$
7
.
06
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
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
Mon, Mar 25
on $35 of items shipped by Amazon
Only 6 left in stock (more on the way).
Alkaline Buffer, 300 g / 10.5 oz
4.7 out of 5 stars
1,156
300+ bought in past month
$12.09
$
12
.
09
List:
$13.58
$13.58
Save more with Subscribe & Save
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$11.95
(16 new offers)
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
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Continuum Aquatics Flora-Viv KH+ - Professional Alkalinity Boosting KH & pH stabilizer for All Freshwater & Planted Aquariums, 500g
4.2 out of 5 stars
78
$18.53
$
18
.
53
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
More results
Fluval Sea Alkalinity for Aquarium, 8-Ounce
4.4 out of 5 stars
112
50+ bought in past month
$3.79
$
3
.
79
List:
$7.99
$7.99
$3.60 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
API pH UP Freshwater Aquarium Water pH Raising Solution for fish,4-Ounce Bottle
4.5 out of 5 stars
2,327
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
Mon, Mar 25
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
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
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
KORDON #35316 pH Increase Adjuster for Aquarium, 16-Ounce
4.4 out of 5 stars
380
300+ bought in past month
$6.92
$
6
.
92
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
Seachem Prime Fresh and Saltwater Conditioner - Chemical Remover and Detoxifier 500 ml
4.8 out of 5 stars
35,106
6K+ bought in past month
$18.49
$
18
.
49
List:
$21.40
$21.40
Save more with Subscribe & Save
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$18.48
(20 new offers)
Tetra EasyBalance Plus 3.38 Ounces, Weekly Freshwater Aquarium Water Conditioner (836135)
4.6 out of 5 stars
1,466
100+ bought in past month
$4.99
$
4
.
99
List:
$7.04
$7.04
$4.74 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
API pH DOWN Freshwater Aquarium Water pH Reducing Solution 4-Ounce Bottle
4.6 out of 5 stars
746
200+ bought in past month
$8.38
$
8
.
38
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
More Buying Choices
$5.88
(9 new offers)
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
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
KORDON #35326 pH Decrease Adjuster for Aquarium, 16-Ounce
4.1 out of 5 stars
236
300+ bought in past month
$7.21
$
7
.
21
Save more with Subscribe & Save
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Fritz Aquatics 81103 Fritz pH Lower for Fresh and Salt Water Aquariums, 16-Ounce
4.4 out of 5 stars
506
$19.20
$
19
.
20
Typical:
$21.04
$21.04
FREE delivery
Apr 1 - 4
Or fastest delivery
Mar 29 - Apr 3
Seachem Acid Buffer 300gram
4.7 out of 5 stars
680
300+ bought in past month
$12.06
$
12
.
06
List:
$15.86
$15.86
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$11.50
(16 new offers)
API PROPER pH 8.2 Freshwater Aquarium Water pH Stabilizer 7.4-Ounce Container
4.5 out of 5 stars
673
200+ bought in past month
$10.98
$
10
.
98
$10.43 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Seachem Alkaline Buffer 600gram
4.7 out of 5 stars
510
100+ bought in past month
$16.99
$
16
.
99
$16.14 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
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
Thu, Mar 28
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
API PROPER pH 6.5 Freshwater Aquarium Water pH Stabilizer 8.5-Ounce Container
4.5 out of 5 stars
228
50+ bought in past month
$10.98
$
10
.
98
List:
$15.78
$15.78
$10.43 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
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
$15.22
$
15
.
22
Save more with Subscribe & Save
FREE delivery on $35 shipped by Amazon.
Usually ships within 2 to 3 days
Seachem Neutral Regulator 250gram
4.6 out of 5 stars
2,017
600+ bought in past month
$7.24
$
7
.
24
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
KORDON #35314 pH Increase Adjuster for Aquarium, 4-Ounce
3.8 out of 5 stars
7
$6.31
$
6
.
31
Save more with Subscribe & Save
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Seachem Reef Buffer 250gram
4.7 out of 5 stars
547
50+ bought in past month
$7.12
$
7
.
12
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
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
$18.24
$
18
.
24
Save more with Subscribe & Save
FREE delivery
Tue, Mar 26
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Only 1 left in stock (more on the way).
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
578
200+ bought in past month
$13.92
$
13
.
92
List:
$15.78
$15.78
$13.22 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
Imagitarium pH Reducer, 4oz
4.8 out of 5 stars
11
$7.99
$
7
.
99
(
$7.99
$7.99
/Count)
FREE delivery
Mar 25 - 29
Or fastest delivery
Mar 21 - 25
Only 20 left in stock - order soon.
More Buying Choices
$7.90
(3 new offers)
API Perfect Start Complete Aquarium Start Up Program Additive, 1 Count (Pack of 1)
4.4 out of 5 stars
150
$18.39
$
18
.
39
Typical:
$19.36
$19.36
Save more with Subscribe & Save
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$17.99
(2 new offers)
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
Mar 25 - 26
Or fastest delivery
Mar 20 - 22
Only 11 left in stock - order soon.
API pH DOWN Freshwater Aquarium Water pH Reducing Solution 1.25-Ounce Bottle
4.3 out of 5 stars
231
$7.85
$
7
.
85
(
$6.28
$6.28
/Fl Oz)
List:
$10.99
$10.99
FREE delivery
Mar 25 - 26
Only 5 left in stock - order soon.
More Buying Choices
$7.51
(6 new offers)
API pH TEST & ADJUSTER KIT 250-Test Freshwater Aquarium Water pH Test and Adjuster Kit (29A)
4.6 out of 5 stars
773
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
Mon, Mar 25
on $35 of items shipped by Amazon
Tetra Correct pH Tablets - 24 Tablets Total (3 Packs with 8 Tablets per Pack)
4.6 out of 5 stars
302
50+ bought in past month
$12.64
$
12
.
64
List:
$17.99
$17.99
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
Only 4 left in stock - order soon.
More Buying Choices
$11.91
(7 new offers)
Imagitarium pH Enhancer, 4oz
4.7 out of 5 stars
7
$7.99
$
7
.
99
(
$7.99
$7.99
/Count)
FREE delivery
Mar 21 - 22
Fritz Aquatics 81104 Fritz pH Higher for Fresh and Salt Water Aquariums, 16-Ounce
4.1 out of 5 stars
154
No featured offers available
$15.99
(1 new offer)
Red Sea Aqcult 306168 1 LTR Reefer Foundation B Alkalin
4.7 out of 5 stars
251
200+ bought in past month
$27.50
$
27
.
50
List:
$32.82
$32.82
$26.13 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$22.42
(21 used & new offers)
Seachem MultiTest - Marine pH/Alkalinity - 75 Tests
3.7 out of 5 stars
23
$17.99
$
17
.
99
FREE delivery
Mar 21 - 26
Only 8 left in stock - order soon.
More Buying Choices
$16.31
(8 new offers)
Seachem Ph Alert for Freshwater
3.8 out of 5 stars
165
$12.25
$
12
.
25
$10.48 with Subscribe & Save discount
FREE delivery
Sat, Mar 23
on $35 of items shipped by Amazon
Or fastest delivery
Fri, Mar 22
More Buying Choices
$8.10
(18 new offers)
Reef Carbonate, 4 L / 1 fl. gal.
4.8 out of 5 stars
3
$38.04
$
38
.
04
Typical:
$48.41
$48.41
FREE delivery
Tue, Mar 26
Or fastest delivery
Mon, Mar 25
Only 4 left in stock - order soon.
Bionic Part 1 Treatment, Alkalinity
4.0 out of 5 stars
39
$25.59
$
25
.
59
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
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
Mar 25 - 27
Or fastest delivery
Tue, Mar 26
Only 3 left in stock - order soon.
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 on $35 shipped by Amazon.
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.
Seachem Liquid Neutral Regulator 500 ml, 16.9 fluid ounce.
4.4 out of 5 stars
127
100+ bought in past month
$11.03
$
11
.
03
Typical:
$13.43
$13.43
Save more with Subscribe & Save
FREE delivery
Mon, Mar 25
on $35 of items shipped by Amazon
Only 14 left in stock (more on the way).
Continuum Aquatics Basis Borate Free KH Buffer - Professional Alkalinity Boosting pH and KH Control for Marine Fish and Reef Saltwater Aquariums, 500-g
5.0 out of 5 stars
1
$14.41
$
14
.
41
FREE delivery on $35 shipped by Amazon.
Usually ships within 3 to 5 days
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