I am using a hyrometer. when i got them from bills they were under his 400 mh( not sure for how long) they are now under 175mh and t5 actinics. the hammer is getting a mild flow said:Bill staggers his lighting schedule to simulate cloudy/sunny day's, so unless it's been there a while it still could be lighting related but.... I doubt it, I thought you put that 4 light T5 unit w/icecap's over your tank recently. I would suspect salinity or alk maybe, never hurts to get those two rechecked to verify your kit's/equipment is telling you the truth.I would also make sure the mg is within nsw levels also.
Cheers,
about 20in down and directly under the 175watt mh said:Depth is fine... even directly under it. Just give it some time to adjust and keep an eye on that top head. My wall hammer took a good 2 months to settle in and finally open up all the way. If it continues to pull in or loses any coloration, move it around a bit and find some place with very little flow and see if it opens up more. If it does open up more, than you found a sweet spot.