whoa.. k.. can teach use how u maintain ur tank's coral without a CR and the Coraline is growing like mad... and how u also maintain the ca level in ur tank...
Like what product u are using to top up and how many times?
Also how many type test kit u use and times a week u test ur water?
I maintain my PH, KH, CA and MG stable and PO4 at 0.
As long as u maintain e above plus adding iodine, provide water current. Coraline will grow. The Coraline flower u see, started 2 years ago, since then, I didnt place any coral on it and occasionally clear the settled particles.
Initially (without SPS), I test e water every 3 day with Salifert test kit. After some time u will know the routine and know how much to add to maintain the water even without testing.
Now(with SPS), I test e water every week and calculate and plan the dosage for 1 week.