Need Advice on Live Rock

I have a 90 gallon tank and im ready to add live rock, but the thin is i dont know how much to add or how to do it should and do the base with base rock and just cover the exterior with the premium rock.? The rest is here: Need Advice on Live...

water circulation

Ok so I’m getting ready to buy some powerheads for a future reef tank I was curious on how much circulation is recommended? I have a 90g tall and interested in all types of corals; any help on subject would help thanks

water circulation

Ok so I’m getting ready to buy some powerheads for a future reef tank I was curious on how much circulation is recommended? I have a 90g tall and interested in all types of corals; any help on subject would help thanks

Pumps/ RO systems

Hi out there. I’m looking for some advice on pumps. Doese anyone know about 9000series Quiet One pumps? I have a chance to get one but heard they made a lot of noise. Also, any recommendations on a good reverse osmosis system? Thanks!

Ballast placement

Ok, here is my dilemma. I have 3 400W magnetic ballast. Where do most people place the ballast? I am not familiar with them. I have run them for a few minutes, not much heat. Do they tend to heat up over a lighting cycle? how much air circulation is needed etc. Thanks! Ballast...