Overflow

[tileman]

I have run mine now for over 3 years and no problems. But for extra peice of mind and to keep the pump working for a long time, you should also add the pre-filter in front of the aqua pump to keep the crud out of the little bladder that the pump has. It doubles the life span of the pump , and they are very cheep. I also keep a spare pump, just in case the pump you are useing fails.
Thats how I keep peace of mind. You also need to clean out the algea buildup periodically from your litlle air siphon hole, useing a paperclip. IME.

[tileman]

This is the order # at Drs. Foster & Smith for the filter.
CD-18881 Aqua Lifter Filter

[Fatman]

I currently use a pvc overflow thats cheap to make and with poweroutages has no lost siphon, this is on a small 10 gallon though.

[mburke]

I use one from CPR with the pump. We HAve numerous power outages with no problems. Just during regular maintainence I clean the pre filter and the intake hole of debris. With the adjustable standpipe takes a little fiddling with but mine is just aboiut silent.

[greg97527]

cpr overflow with aqualifter pump is the way to go. no noisy u-tubes just a flat siphon area and man i love the aqualifter. power outages etc no biggey no floods etc.