My water was consistently reading 280 mg
(even after water changes). I started adding a two part calcium and buffer daily about a week and a half ago. My water tests today:
Phosphate: <.25 (didn't realize API phosphate test was so useless)
I was a bit alarmed about how high KH
and PH are. PH was originally 7.8 before I started adding and KH
was 8. Only other thing I've done to the tank is add a phosban reactor.
I have been doing water changes (10%) about once a week using RODI
water. I'm using the regular instant ocean sea salt.
I'm assuming the Ca
and buffer I'm adding is leading to the increased PH and KH
. How do I increase Ca
without messing with KH
and PH? And why aren't water changes helping increase Ca
The tank: 55 gal
reef w/live rock. 1 toadstool, 1 Duncan, 1 ricordea, 1 clove coral, 1 xenia (came off plug and is likely decaying in the filter somewhere), 1 percula clown and 1 bicolor blenny. About 2 months old.
And just to throw in one more thing - I have a small cyanobacteria growth in one part of the tank. I am on day two of no lights. Wanted to make sure that three days without light won't cause irreparable harm to the corals I have.