Crushed coral is a great tool for raising your pH. We personally use it at 1 pound of crushed coral per 10 gallons of water when mixed in with our gravel. Crushed coral dissolves over time continually. The lower your pH is, the faster it dissolves. As the pH rises, it slows down how fast the crushed coral dissolves. We find that Crushed coral may need to be replaced every 1-2 years depending on how low of  a pH the tap water is. 

Crushed coral adds a bit of hardness to the water but not much. It does add a lot of kH which buffers the water from pH changing.

 

When using it in your filter, crushed coral will dissolve faster. This means you'll usually use smaller amounts but replace it more frequently from to 1-3 months being most common.

Crushed Coral 1 Pound

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Crushed coral is a great tool for raising your pH. We personally use it at 1 pound of crushed coral per 10 gallons of water when mixed in with our gravel. Crushed coral dissolves over time continually. The lower your pH is, the faster it dissolves. As the pH rises, it slows down how fast the crushed coral dissolves. We find that Crushed coral may need to be replaced every 1-2 years depending on how low of  a pH the tap water is. 

Crushed coral adds a bit of hardness to the water but not much. It does add a lot of kH which buffers the water from pH changing.

 

When using it in your filter, crushed coral will dissolve faster. This means you'll usually use smaller amounts but replace it more frequently from to 1-3 months being most common.

Customer Reviews

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J
J.

My tap water is absurdly soft, so I ordered this in hopes that it would raise my KH as my PH was very unstable. After putting a small handful in a filter bag it's been in hob for a few weeks now. It seems to be working well, my PH has been stable with no issues.

J
J.K.
crushed coral

well, to be honest, didn't need that much but better to have more than not enough used it to assist in my city aquarium water so far has done exactly what I wanted a hight ph mine was in low 6 know 7.2 well done and thanks they knew exactly how to fix my problem took about a week and added just a little bit to fix it thanks again

M
M.S.
As advertised

Perfect! No complaints