Originally Posted by AquaRick
Going to be honest and say that the API calcium test kit is total garbage. It is hard to read, duplicate results, and not very accurate. Your best bet would be to get a better test kit for Ca
. Red sea and salifert come to mind as quality test kits.
If your tank is relatively new, your coraline will take time to grow. Just give it a bit.
Agreed with Rick. I find the API calcium and phosphate test to be too much effort and I'm never sure what the actual reading is. LOL
I use salifert tests and have not had any issues with it. The color change is noticeable and overall accurate.
As far as dosing calcium, I dont think with just 4 frags that it would be necessary as long as you are doing your water changes like you said. I dont even dose calcium in my 125g reef and its full of corals.
I'd get an accurate test kit and go from there. Calcium at 400+ should be fine.