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I have a 180 gallon and I have six 950 g/hour power heads, with a 1000 g/hour return on my refugium-sump. this would equate to about 6,700 gallons of water movement an hour and the tank works fine with corals (large polyps and small), as well as the softies. My power heads are on timers and do...

As you ca tell water changes are a matter of the amount of time you really want to put into the changes and your water chemistry. I think a good start is to do a 10% at least once a week, that is what most book recommend these days. I do a 3% change every day and have great water chemistry. I...

Live rock is rock that has been aged and has living organism contained inside. When a person takes down a tank and removes the rock and places the rock in dry storage it no longer is "live rock." The rock is now base rock. I would be sure that you are buying rock straight from a tank and not a...

Shep: I used a timer that had multiple settings nothing special, one that had the pins that you push in or out and you set every 1/2 hour ad is a 24 hour timer. The timer has two outlets so you can plug in two power heads. I purchased my at Lowes.

For most of my years in salt water I used only power heads, recently I decided to purchase a couple of timers from a local hardware store and plug my powerhead into the timers to make my own sruge monitors. I do think that the corals do like the wave action better when there is heavy movement...