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how many cory's would be a good clean up crew in a 240 litre tank???thanks in advance for any help.

You could certainly have more than 5, probably more than 20 too if you wanted, but it depends on what else you have in the tank.

Clean-up is of course a bit of a "definiton", because anything that goes into the tank (food-wise, or more precisely any protein in the food) will turn into ammonia->nitrite->nitrate.

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Mats

hi matsp.my fish are listed in my sig

Ok, I didn't see that because I only thought about asking when I was in the middle of writing the reply, and when replying, you don't see sig's. [That's my excuse, and I'm sticking to it...]

1 x 12" fire eel,7 x red torpedo's,4 x dwarf gouramies,2 x rainbows,3 x bolivian rams.

With that stocking, I think you can run anything from 5 to 10 cory's or more, if you like.

I don't know what sort of fish a fire-eel is [I have seen them in the shops, but I don't know anything about them], does it eat other fish, or not? If it does, you need to make sure that that your cories are big enough to not be eaten by the fire-eel, now or later when the fire-eel is bigger [if it's getting bigger than that]. Most cories will grow to 2" and a bit (SL), but usually not much bigger than that.

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Mats

thanks for the advice. i was thinking about 6-7 sterbai.what are your thoughts on this.its only to clear up bloodworm,bits of tetra prima etc.i have a royal plec and 2 syno sailfins going back to lfs as they are destroying my plants.

Sterbai are nice, and like warm water, which I expect you have for the gourami's.

I just bought a few sterbai's myself, and they are nice. A bit pricey compared to the more common cory's, but look more stunning too, so as usual, you get what you pay for. I got 6 myself.

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Mats

trimar are doing them for £10 for 3 so what do you reckon.6,or,shall i get 7-8???

6 is a decent number, should give you good chances of a female/male mix that could give you breeding (I'm assuming you can't pick sex because they are still juveniles and hard to sex). Seems like a much better price than I got mine for, but I guess trimar is pretty good when it comes to pricing...

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Mats

hi matsp,got 9 in the end.babies as well.real cute.just put them in the tank about an hour ago.thanks for all the advice.

Good luck with them. I just moved mine (moving house), and they seem to have coped well with the stress, eating nicely and such.

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Mats

Good luck with the move, Mats!

cory's are doing great.best thing i ever did was to get rid of the plecs and get the cory's.sand is soooooooo much cleaner.