Sea Critters With Goldfish?

[michaelb_123]

Hey, got a 30 gallon tank with a a large-ish goldfish in on its lonesome. Know from your wonderful opinions that it is very 'poopy' and so other fish would be inadvisable unless you can suggest some?

So the thought came upon me to keep snails in there.

Although i haven't done MUCH reearching admittedly i have only found tropical ones.

Haven't come across many coldwater sea critters either?

Can anyone suggest anything to go with this lonesome goldfish?

Thanks a lot. . . .

 

[pinkdolphin_113]

An under gravel filter lol

 

[tttnjfttt]

You could probably add another goldfish in to the tank, depending on the size. The usual rule is 20 gal for the first fish then 10 gal for each fish after.

 

[pinkdolphin_113]

Why a critter? Why not a lovely weather loach?