04-08-2008, 02:09 PM
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Well, once you have an algae "problem," the only solution is to get in there with the scrubber and go to town. My mystery snails seem to prevent me from ever getting to the point of having an algae problem, though. Some shrimp can make great algae eaters as well, but the more interesting ones are more expensive and there's always the possibility that they'll end up as fish snacks. You could always buy a few ghost shrimp (the LFS sells them for 15 cents here) and see how those do. If they survive for a few weeks, an investment in more expensive shrimp could be worthwhile.
My cories breed and lay eggs on a regular basis. The biggest predators of cory eggs in my tank are the cories themselves. The mystery snails also try to eat them, but are less successful at scraping them off the walls. I enjoy my cories, but I don't particularly want to start a cory factory so I'm fine with letting the eggs get eaten.
If you're returning the algae eater and paradise fish, you should think about getting something that will eat your livebearer fry (that is, unless you are trying to breed them). Spotted leaf fish would do a great job of keeping your 4 platies from turning into 100.