Originally Posted by wake49
Yeah, I would only use one pump, good catch.
Actually even one pump failing runs the risk of a problem, come to think of it...Maybe I should just drill the two tanks and join them with some PVC. How hard was it to drill your 98?
with one pump it could still happen but chances are way less. hang on overflows IMO suck though and drilling is the way to go. my last tank had a few floods from a hang on overflow box that had an aqualifter. the lifter made things "safer" until that clogged.
drilling a tank isnt difficult skill wise, it just takes 15 minutes, a fully charged drill ( if its not a plug in ) and a prayer. there are youtube videos on how its done and glass drill bits can be found on ebay. i must say im 100% happy with how i drilled my display because the overflow box is so small but so effective. the reef ready tanks come with an overflow ( some even 2 ) that i feel takes up half the tank.
you could always join the 2 tanks with bulkheads or find a used tank on craigslist.com for cheap. if your plumbing it to your basement i suggest a rubbermade stock tank ( which is a thick plastic bin ) that come in 100 and 150 gallon sizes ( and im sure other sizes in between ) add a baffle to one would be near, if not impossible but their size prob. beats a similiar sized tank to use as a sump.