Brandxn Posted August 24, 2022 Share Posted August 24, 2022 I just added crushed coral in a mesh bag in my HOB filter to raise my PH and KH/GH. PH is around 6.8, KH is 3 drops and GH is 5 drops using the API test kit. I have Amano shrimp, Nerite snails, neons, Otos, Panda Corys & Peacock Goby’s in a planted tank. My question is how much crushed coral should I use and for how long should I leave it in. Is it something that I can just leave in or do I have to remove it when the water is in the parameters that I want. Also how much do I use or does it not matter? I have around a 1/4 cup in the bag. Thanks. Link to comment Share on other sites More sharing options...
KBOzzie59 Posted August 24, 2022 Share Posted August 24, 2022 It dissolves very very slowly, your pH will get to a point where it dissolves even slower. I leave mine in, matter of fact I have a couple tanks with it as substrate and as I recall the pH hangs around 7.4. I'll test when I get home and update if I'm wrong on that. A quarter cup is fine, just give the bag a light rinse when you do filter maintenance. 1 Link to comment Share on other sites More sharing options...
nabokovfan87 Posted August 25, 2022 Share Posted August 25, 2022 On 8/24/2022 at 10:03 AM, Brandxn said: My question is how much crushed coral should I use and for how long should I leave it in. Is it something that I can just leave in or do I have to remove it when the water is in the parameters that I want. Also how much do I use or does it not matter? I have around a 1/4 cup in the bag. Thanks. when I tried to buffer mine.... the HoB was about 75% of what I "needed" to buffer mine 1 degree. Meaning, to go up 1 drop, it was .75 lb of CC to the HoB. You can see it adds up pretty quickly and there is a point of limited returns. I even tried to use a ziss bubble bio to hold another lb of CC and that didn't work well enough. To be clear, the filter I had was the Tidal, which has bypass issues. That being said.... I would only recommend CC in a canister because you can actually get enough in there, as a chemical filter media, to cause enough of a difference. You're best chance to use CC is to add it to the substrate or add it as a base layer and cap it. I use Seachem Alkaline buffer on my tanks. Link to comment Share on other sites More sharing options...
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