Please be gentle ...

I really wanted to winterize and fix my outdoor ponds for my fish to overwinter in but it's just not going to happen. I went out today (may be one of the only nice days left before getting cold) and drained part of the pond and caught all the fish left in it. I has set up a 20gal long tank to house the remaining few fish I thought I had left (water green and hard to tell what was actually in there) in my basement with a light and airstone to start with. I plan on getting a filter to go in there as well VERY soon (maybe tomorrow). Anyway, when all was said and done I ended up finding 3 fantails (about 1 & 1/2 inches each, not counting tail) and 6 comets (ranging in size from 4-6 inches). Now, my questions are ...

What size filter would be good for them down there?

Will the tank be ok for them to overwinter in until next spring when they go back out in the pond?

My final option (only as a last resort) would be to switch all of my geckos around and place them in smaller tanks in order to free up the 50 gal reptile breeder tank I have down there for the pond fish. I hate ot have to do that but if it NEEDS to be done then I might just have to get started with working on that solution. What do you all think ... can these 9 fish be happy in the 20 for the winter?

Please be gentle! :bowing:
 
You could also get a stock tank. They come in size from 5 to 500 gallons. They can be found at a local farm supply store if you have one for pretty cheap.

If it were me I'd get a stock tank around 50 - 150 gallons and use the filter from your pond on the stock tank until the temps are warm enough to go back in the pond.
 
Will the tank be ok for them to overwinter in until next spring when they go back out in the pond?
A 20gal is pretty small for just the 6 comets you mentioned... so with even more goldfish, in my opinion not it's not adequate - doable though with some work.
Like Stephen suggested, a stock tank is better. Rubbermaid 150gal runs about $149 here. The more water you have the easier it will be to manage and less room for wq to get outta whack. With a stock tank you could also most likely use your pump and filter from the pond.

What size filter would be good for them down there?
What filter do you have on your pond? If anything bring in the media from that filter to a new filter for your setup. Just my opinion, but a filter for pond fish should be no less than 1/4 the volume of the pond/tank...
 
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