RovingGinger Posted August 21, 2020 Share Posted August 21, 2020 I’m struggling to find comprehensive information on how to use ground coral in or as substrate. I ended up with a small bucket full along with two free tanks, along with some white coral pieces. I have 3 bumblebee gobies who I’d like to move to a 12 gallon nano. They are in fresh well water, very hard and high Ph. Is this a good use case? Or since I already have high ph, is it not for me? Link to comment Share on other sites More sharing options...
Bill Smith Posted August 22, 2020 Share Posted August 22, 2020 In my experience, crushed coral is a perfectly serviceable substrate for freshwater tanks. Even though I also live in a place with hard water and high pH, my multi colony loves it: I don't think there is any harm in using as a full or partial substrate in a tank where your fish are suited to hard water and high pH, even if your water already has that. I don't really think it will make the water any harder or raise the pH to any noticeable degree, if they're already high. I think it will serve to increase your buffering capability. But for folks who want to use crushed coral for soft/acidic tanks, I've heard 1 pound per ten gallons as a common measure to help raise and buffer the pH and hardness. 1 1 Link to comment Share on other sites More sharing options...
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