I have a 20 gallon fishtank with three goldfish and one plecostamus. Everything's been great for over a year until yesterday. There was some water evaporation so I decided to add some plain tap water, a couple of gallons, maybe. I've done this before with no ill consequences. Then I discovered that I had some Aqua Plus left, and poured in about 1/2 cup. It's always worked fine both in this tank and in my pond outside. However, this morning (the "morning after") my tank is completely cloudy! The fish look okay but I just don't understand what's going on. The tap water was completely clear, and Aqua Plus is used to clear up cloudy tanks! What could be going on here?? the fish are still looking good but the cloudy tank looks horrible.
posted by DMelanogaster on Nov 17, 2009 - 9 answers

What kind of pet should I get? [more inside]
posted by Tu13es on Jan 12, 2009 - 25 answers

I just rescued a couple of fancy goldfish, and I could use some advice on how to properly care for them. Is it normal for them to rest on the bottom of the tank? How much should I feed them? [more inside]
posted by team lowkey on Apr 18, 2008 - 11 answers

I want to get a small aquarium. What are the types of fish that are the cheapest and easiest -- read: low maintenance -- to take care of in terms of feeding, changing the water, etc, but at the same time, are pretty to look at? Any additional advice on tanks/filters is welcome too.
posted by bondgirl53001 on Jan 23, 2008 - 23 answers

Help me take my tropical freshwater fish to the next level. [more inside]
posted by letsgomendel on Nov 26, 2007 - 10 answers

Will a pet fish survive in my office over the weekend? [more inside]
posted by sandra194 on Dec 20, 2005 - 17 answers

My aquarium filter, an aqua clear 500, makes a lot of humming noise. Do you know of a very quiet filter (maybe one of those external ones?), or do you have suggestions for making it less noisy?
posted by about_time on May 27, 2005 - 8 answers

Should I turn off the light in my aquarium overnight so my fish can "sleep"? Or is that just stupid? [more inside]
posted by crawl on Jan 27, 2004 - 14 answers