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I will soon be setting up a 90 gallon for my two stunted comet goldfish, I have a few quesitons

- how many mroe goldfish coudl i add?
- maybe another comet and some other variety
- what other types of fish can be with goldfish ( ex.any tetras pleco , etc

- do they need a heater

- will a sand substrate be ok?

Goldfish do need heaters even though they are considered a "coldwater" fish in order to keep their water at a constant temperature.

Comet goldfish really don't belong in tanks. They are big, thick, messy fish that do much better in ponds. Since your current ones are stunted you might be able to add fancy goldfish or a couple small plecos. I wouldn't add any common plecos. Like the comets one could fill that tank pretty well by itself. Make sure you have plenty of filtration because both plecos and goldfish are some of the messiest fish. Sand might work but would probably be a pain to keep clean.

What country are you in import? With comets i'd be less inclined to add a heater, but it does depend on the stability and temperature level of the area you are in

I'd just choose a small bottom feeder or two and leave it at that for a little while. Perhaps given the room to expand your goldies will just take off in size over the next 6 months. If not, *maybe* you could go with a fancy or two, but i'd not rush into that as 1) comets can be boisterous and 2) fancies don't really stay small either.

Good luck, and well done on the upgrade!




For animals, the entire universe has been neatly divided into things to (a) mate with, (b) eat, (c) run away from, and (d) rocks. - Terry Pratchett

Goldfish also give off a really high amount of sodium and it can be bad to have more than two in the tank.

Inky

Sand substrate will be okay, but not the best. My goldfish love to nibble around in the substrate looking for tidbits which would be more diffictlt with sand. Additionally I wouldn't use sand because of the higher waste that goldfish are known to produce and the water flow required to keep sand clean.
Is there a specific reason you want sand? I use landscaping pea gravel in my indoor "pond".

I do agree that they'd be better off in a pond but if that's all you can do for them it's better than nothing! Depending on how much the air temp changes in any given period you may be okay without a heater considering the size of the tank.

I wouldnt be adding too many fish. Like callatya said they're active fishies and may be a bit too much for calmer fish. Depending on the size of yours now you might look at something like white cloud mountain minnows. They're fast and active and stay small meaning less of a bio load.

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i would leave it alone with that. i do have some rosy barbs in with my goldfish, so it can be possible to add about 5 of them in. but no other goldfish.



Last edited by BettaChris at 20-Dec-2005 19:24