do any of you guys or gals' know of a fish like one of those plecostumus things or a snail that would do good as a bottom feeder in one of those large outdoor ponds but in a water dragon cage. i would get a plecostamus but i was told that they can sting a wd. is this true? i just want something to help rid of algae thanks 
p.s. im putting in a fluval 104 or 204. but i dont think this will be able to pick up all the algae.
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CHONG188

