Zacktosterone
Active member
No aefw either
8 dKh : 410ppm calcium is a solid ratio...
Browning can indicate not enough light, too many nutrients or not enough water movement.
I really hope I have enough light... I've got a 24" tank and an ati led power module with 4 bulbs directly over my rock structure.
Is 24" back to front? If so, an 8-tube power module would be my choice. However, 4 bulbs may be OK providing that your corals are direct underneath the bulbs.
My tank is 21" (back to front). I use a 8 X 39W powermodule.
IMO that light is alright for a mixed tank with some care taken as to SPS coral placement.
The LED clusters on the ATI units dont use lens, rather they use tiny reflectors and I can confirm from my own PAR measurements that the spread of light is pretty good...hence I would place this 4xT5 with 3xLED cluster unit more like an 8tube T5 unit.
An 8 tube unit will be far better for coverage for sure...but I wouldnt be concerned about a lack of PAR since this sounds like a mixed tank.
IME most of SPS colour issues is down to water quality rather than light out put or light coverage...
Well at this point I think your going to have to post pictures as it may not be anything to do with water quality.
Michael
Ok so no camera....
UPDATE
Ok so that brown mili is still brown but get this.. It has full polyp ext and is encrusting!! What gives!! I'm changing my salt to red sea to see if that changes anything
I doubt it's the salt at all. IME, some millepora take a long time for the polyps to color up, even though the coral tissue is brightly colored.
I would try moving it up closer to the light, or increasing your lighting time or intensity. Everything else seems to be in line.