RTN question

[rng_pw]

I have 3 corals that have been slowly rtn'ing over the last couple of weeks. All on the bottom of the corals. Any way could low calcium and high alk cause this? I just tested my tank and my calcium was only at 300 but my alk was at 14. Thanks in advance.

Ricky,

 

[condor]

yes kh too high and ca too low is not good, when you dose your ca back up it will drive down the kh a bit, and check your po4

 

[rng_pw]

just tested po4. range 0-0.05 with a seachem test. Thanks

Ricky,

 

[roscoe]

I'm having the same problem. My last test alk was 14, Calcium 400 and mag was 1300. It is only my torts and a couple others.

 

[condor]

check your no3 and try to get your kh down a bit

 

[rng_pw]

My salinity is at 1.027. could this be part of the cause? Thanks. Ohh yeah as of this morning my calcium was at 375 and my alk was down to 11. I dosed some more calcium.

ricky,