Need some help with browning out sps

[daniella3d]

I doubt it. I don't have much flow in my tank. I have 5ppm of nitrates and quite a bit of phosphates, yet my SPS have great colors and they grow fast, under 250 watt Pheonix MH.

Some of them grow a lot and there is so little flow that you bearely see the polyps moving.

Polyps are out so much that I cannot see the skeleton of the coral (milleporas).

I would think it's the light here that is the problem. Probably the coral need acclimatation to the new light. When I moved a few frags of SPS to my 20 gallons tank with T5HO they became brown and are still brown to this day, but in that aquarium I have nearly 0 nitrates and phosphates and a lot of flow, plus a Deltec 300 skimmer. It's wierd sometime how they react. Maybe once a SPS get used to a type of light it will take a long time to adjust to another light? dunno. I wanted T5HO so that I could have low nutrient system with pastel color corals. I never hapened.

Originally Posted by reefwars

i think your problem is not enough flow , which is not pushing enough into your filtration.

a hob skimmer only pulls out what it can suck around it , powerheads help keep stuff suspended so the skimmer pulls it out.


i wouldnt rely on just my skimmer output and ac for flow.