Small Frag Tank Troubles. Advice?

[dmmitchell]

Dealing with a ten gallon frag tank. No fish, just a whole bunch of LPS corals - torches and other euphyllia, a cynarina, pectinia, an Godzilla mushroom and a few snails. Probably 30 frags in all.

Several of the corals aren’t doing all that well. A pectinia and some other frags have hair algae growing on them, other corals are receding.

Parameters seem decent, perhaps alkalinity a bit low:

Alk: 6.5 dKH
Phos: 0.02ppm
Nitrate: 0.0ppm

All measured with Hanna Checkers.

Any advice?

 

[Estonian Reefer]

Could be many factors but provided on the information I'd advise to raise phos 0.05-0.01 and NO3 to 5-15 range. 10 gallon is small water volume whiting it self is a challenge to keep stable. Dkh seems on low side as well. - dosent give much room for mistakes ,errors. Hair algae might suck NO3 and PO4 which could give you false readings. U need something in there that will eat algae.

 

[Lavey29]

I agree with the above and if corals have algae growing on them then they are in decline under stress.