i have 3 goldfish in a 29 gal tank. my water is a yellowish color and my fish are sitting on the bottom. ?

do you do weekly water changes, if so how much?

it's definitely a water quality issue, your tank is NOT cycled. you'll need to get a water test kit, something for ammonia and nitrite, these are the most important.

also, that tank should be fine for 3 FANCY goldfish (a tiny bit tight, but not causing those problems) so if the "regular goldfish" is a common goldfish or a thin bodied goldfish he may be part of the problem. instead of getting a larger tank look into finding him a new home. someone with a pond will be a good home, or a very large tank.

anyway, read this, it will help a lot, if you follow it your tank will improve with time.

http://www.kokosgoldfish.com/cycle.html

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liz c. a clarifier and other chemicals will not fix a problem, only make your tank look pretty again. it's like taking medicine to make a broken leg not hurt. it doesn't mean you leg isn't broken anymore. there is obviously a problem and the fish are in danger, not addressing the problem will not help the fish.

You put too many fish in the tank too fast. The tank is still cycling and goldfish are high ammonia producers. My recommendation would be to take the comet (regular goldfish) back as it will out grow the tank and will likely out compete the fancies for food in a small tank A 29 is really only large enough for 2 fancies anyway. Your filtration is good for the size tank you have as goldfish need double filtration. The petstore gave you good advice. You are going to need to keep doing 50% water changes daily until the cycle is done to have any chance of saving your fish.

Your tank is not Cycled at all.

Check this link to find out all about cycling http://www.worldcichlids.com/faqs/cycling.html

http://www.firsttankguide.net/cycle.php

http://faq.thekrib.com/begin-cycling.html

Since you picked gold fish, they are very messy fish. So in a non cycled tank its very possible for them to die. Next time pick more hardier fish. zebra danios are good. They are cheap, friendly and very amusing to watch.

Anyways, go buy a full test kit. Anytime they go past the safe zone (at any level) do an 50 percent water change.

But 3 gold fish in a 29 gallon tank, its doable but you will have to do a lot of water changes. And replace your filter often. The best thing to do is to return 2 gold fish and get some smaller community fish. Make sure to ask the pet store what kind of fish get along with an gold fish.

As far as the yellow water go, do you have any thing wood in there or any clay pots?

This is all because you didn't cycle the tank before hand. There isn't enough bacteria in your tank to break down all the ammonia your goldfish are producing.

Do a 20% water change daily with a gravel vacuum. AmmoLock can neutralize a lot of the ammonia, and stresszyme will make conditions better short term. Both of those chemicals will probably prolong the cycle time though.

Read up on diseases due to poor water quality (there's a lot). Your fish will probably get a couple if they don't already.

Good Luck! Email me if you have any more questions and I may be able to help. :)

The problem is the way goldfish gills work. They need a lot of water surface area. The more surface area, the more oxygen gets into the water.

They also need space. Each goldfish needs about 20 gallons all to itself.

You could try getting Rubbermaid boxes. The large ones would hold a lot of water. OR, see if you can find a child's wading pool. Fill it up, declorinate the water (for best results use "Stress Coat" and "Stress-zyme"), catch the fish in large ziplock bags and float them in the water, and it could work until you can afford a proper tank.

Did you put your fish in right away? If so the new filter isn't set up with the bacteria it needs to eat the ammonia. Do water changes and get a product like Cycle, or StressZyme to start the bacteria. Get some Prime as well to take some of the ammonia out of the tank.

I went threw the same problem with my fish. Its a ammonia problem. The answers up here are helpful. just have to wait for the cycle to mature.continue water changes and I would also suggest aquarium salt. which is a tonic for the goldfishes. its helps the fish in a time of stress. table salt is no good. has to be aquarium salt. get it from any pet store and its cheap. also fasting your fish for a couple of days is a good idea. because the break down of extra food is ammonia.

i agree with all the other answers about the pH and cycling the tank, but i have to say that you cant keep those kinds of goldfish together. black moore's are vision impaired and will have trouble getting food from the other goldies with normal vision, by regular goldfish im guessing that you mean a comet which require at least 50 gallons for one because they get wayyyy bigger than fancy goldfish. the tank is too small to fit a comet with the other 2 fancy goldfish. please either get a separate tank for all of them or take two back and get compatible ones with an appropriate tank. and always cycle a new tank before adding any fish!!!!!

Get some neutral regulator, it adjusts the PH, as well as it removes chlorine, chloramine and ammonia from the water. Also while you're out get some water clarifier, it works like wonders.

maybe it'll work after a couple of days