Help with SPS

[Jason McK]

I have 2 SPS frags both Montipora Digitata. They seem to be growing but they never extend their polyps. I have had one for about 7 weeks and the other for 6. My water parameters are all good
Ammonia 0.0
Nitrites 0.0
Nitrates <10
CA 420
PH 8.3
dKH 10.8
SG 1.024
Temp 79-82
They are under 2x250W 6500K MH with 2x110 03Actinics in a 75G tank. I have adjust my PH so that flow is strong but not crazy on both.

Any suggestions would be great

J

[Jack]

When strong currents blow them they seem to close up try lower flow and lower light. They aren't as light/current demanding as other SPS.

Maybe lower your nitrates.

[Jason McK]

Thanks Jack I'll give that a try.

J