Crushed Coral 1 Pound

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  • Raises pH
  • Increases KH to Buffer pH
  • Adds Some Hardness to Water

Crushed coral is a great tool for raising the pH of your water. We use it at 1 pound of crushed coral per 10 gallons of water when mixed in with our gravel. Crushed coral dissolves continuously over time. The lower your pH is, the faster it dissolves. As the pH rises, it slows down how fast the coral dissolves. Crushed coral adds a bit of hardness to the water and it significantly boosts KH which buffers pH from swinging.

Customer Reviews

Based on 216 reviews
Nemanja V. (St Louis, MO, US)
Crushed Coral 1 Pound

great product, very little dust

K.C. (Rock Hill, SC, US)
Perfect fix!!!

Had low ph in several tanks below 6. The guppies were all I’m at the waters surface and I had several ti die. I checked the ph and it was really low. I ordered crushed coral and it arrived very quickly. Time was of the essence. I added it to my filters. Within a hour the ph had started to rise. The guppies were swimming normally again. I have added this to 3 separate tanks and it has worked Everytime.

chris m. (Lake Elmo, MN, US)

Good size if you only need a little bit instead of a ten pound bag other stores offer

Bryan F. (St Louis, MO, US)
Worked as promised

Just some good ole crushed coral, toss it in and let it work! And it worked

Lumpydog (Surprise, AZ, US)
Crushed Coral

I have repeatedly ordered the bag of crushed coral from Aquarium Co-Op. I add a tablespoon to my aquariums as needed to keep kH above “Low” levels. I highly suggest rinsing the coral before adding to aquarium to prevent very short term cloudiness. Coral can sprinkled on light color substrate or added into filtration. This is a good and effective product at budget friendly price.