 new overflow
Ok guys, I've officially had my vacation adventure from hell where my aquarium is concerned. ( I feel the cringing from those of you who know what I'm talking about) 
My overflow pipe cracked after a friend tried to restart the siphon that stopped while I was away. No fancy continuous overflows here, just an upended u-tube. So anywho I'm looking into getting a continuous overflow to make sure this doesn't happen again. (Right now a flexible plastic tube is doing the job)
Now you're saying that's sensible right? Only one problem. I have no idea what my return pump flow rate is. I don't know what the pump even is (what type?) and there is no sticker or engraving. I'm pretty sure that it is less than 600 gph (like 99.9% sure) so if I get an overflow rated for 600 gph, how do I help the return pump and overflow (aquatraders anyone?) to reach equilibrium with each other?
Oh, and Merry Christmas!  Thanks all!!!! 
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55gal,260 watt PC(2x65 actinic,2x65 10k daylight,8 lunar LED) 45#LR, 45#LS, 3 maxi-jet 900's on a natural wavemaker timer,phosban reactor, 5 gal fuge (built out of standard 10 gallon tank) with chaeto, grape, and feather caulerpa, sealife systems protein skimmer, wet/dry, 4 blue/green chromi, 1 skunk cleaner shrimp, 1 coral beauty,1 true perc, 5 mexican turbo snails, assorted dwarf blue leg hermits, astrea snails, and nerite snails |