You'll find lots of info to do with UGFs when you look up PHs because you need a PH (or air bubbler) to run a UGF. I hope you aren't thinking of putting a UGF in your tank???
You will need the power heads for water movement. Live rock, sand and water changes for filtration.
I use a plenum under my subrate, basically a UGF, and use a tube riser with a powerhead to get the plenum running, I had the powerhead for about 5 months. This creates a dead space under my substrate that aids in denitrification.
I have done tanks with and without the plenum, the plenum tanks are generally healthier.
Ah gotcha. I have both AquaClear and Maxi-Jet powerheads. The Maxi-Jets are higher quality, and have lots of different attachments you can use for different applications. But the AquaClears are great too, just not so many attachments.
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