alkalinity issues

Greetings! I’m generally just a lurker, and I don’t usually post. But I’ve run into an issue that I’m not sure how to handle, and I wanted to see if the crowd here might have some good ideas. Background I have a 75 gal reef tank (probably around 80 gallons total volume). The tank has been...

So I just bought the Hanna Alkalinity tester and just finished testing it and it is showing a reading of 7.6dKH and my pH is about 8, from the research I've done, I read that Instant Ocean usually has a high dKH of 12. My tank is relatively new but I want to start testing levels for corals as...

I am not new to this hobby, but last year I got a larger tank, 40 gal aqua-top. I have soft corals and SP, along with 4 fish and some brittle stars that came in the rock, and some snails as CUC. I have a hard time getting my alkaline up. Ranges 6-7, calcium 376, ph 7.9 nitrate 1, nitrite 0, phos...