reptile to fish tank?

first of all, no goldfish can fit in a 20 gallon tank, even the fancy ones, need just a 20 AT LEAST for just one, but NO more fish, so just get the fancy goldfish by itself, and forget about the cory cats, they will get eaten when that goldfish grows because they grow HUGE,(12"+), + u would need different temperatures, thus goldfish needs 68-73, while the corys like it 75-80, and those goldfish make a lot of waste which turns into ammonia, annd that will kill the cory cats, because they have no scales and are more sensitive to ammonia, and stuff, be aware that u would just need a power filter that pumps up to 60 gallons because goldfish are very messy fish and need a 3x filter, and lots of oxygen and air stones.

sorry if i wrote too much, is just that many people make the mistake of buying goldfish without knowing how to take care of them, i dont want more dead goldfish loL

EDIT: since ur goldfish is a common, then get a 55 gallon tank just for the goldfish, because the common comet one grows more than a foot long. mine grew to 18 inches+

I once had a Chinchilla in a 55 gallon and after I moved it to a more friendly housing environment I filled the tank with semi warm water and 1/2 bleach and let it sit for 10 Min's, and scrubbed it with a double sided sponge; then syphoned the water out. Hosed it out really well and when I filled it up for fish treated the water to remove chlorine and stabilised the PH as it would be done with any new tank, and I had no problems.

Also to note that goldfish can get very large ( such as koi, and even regular goldfish ) , so check the water volume along with the type of goldfish you will be keeping in order than they are confortable, and make sure you keep an eye on ammonia levels in your tank. AmmoLock is a good thing for this, and a Freshwater test kit.

Many times you will be told that you should not use the tank for fish after housing other animals or reptiles in the tank. However, glass is not porous to hold in anything from the prior inhabitants, and the seal you will want to make sure it is all intact and no leaks, and that it is not dry rotting, having said that and all things check out with the seal you should do just fine and with no instances. Especially since you are planning to use it for goldfish, which by nature are dirty - in being they leave off ammonia more than other fish, and the tend to produce more droppings, and the cory cats are scavengers themselves - this will be fine !

First, a 20 gallon is too small for a goldfish. One needs at least 35 gallons. Second, I believe cory cats have different temperature requirements than goldfish. Goldfish are coldwater fish and cats are tropical.

I would suggest researching fish that are compatible with each other and with that tank.

As for cleaning it, tear it down completely and wash using bleach. Make sure to completely wash it out until you don't smell bleach anymore, then do it again. This should kill anything that's in the tank. Fill it up and make sure it will hold water before you do anything else. Afterwards, set it back up but don't get your fish yet. Read this first: http://tetra-fish.com/forums/showthread.php?t=1765

Hope this helps, but please don't get a goldfish for that tank.

verify the thickness of the glass and how this is braced. I cant supply you right numbers through fact this is diverse for dissimilar sizes. yet a reptile tank may well be made from thinner glass and not braced comparable to it does not ought to hold water. There are online publications that permit you to grasp the thickness of glass you like for dissimilar length tanks. that's probably that this is basically a classic tank thats been used for reptlies however. Fill it up outdoors first as a attempt, merely in case. Ian

clean it with normal water. if possible use some rock salt to kill any bacteria but no chemical or soap. after cleaning dry the tank, after 2-3 days add water and leave it for 3-4 day.. you may add any kind of aquatic plant which will help to cycle the new tank.. wait atleast a week (from the time you filled with water) and then introduce fish.

Ideally gold fish should not be kept in small tank, they will grow big in a year time and you will find it difficult to maintain. I leave the other experts to comments on the fish selection.

Good Luck

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Rinse and scrub it with hot water, no soap or chemicals.

Please don't put goldfish in that tank, let alone with corydoras.

The tank is just too small, corydoras are tropical fish, goldfish are coldwater and goldfish produce so much waste that it'll kill the corydoras.

Instead you could setup a nice tropical aquarium with guppies and gouramis and corydoras and tetras etc. All you need is a heater, some gravel, a filter, lights and some plants and you'll have a stunning fish tank.

Hope that helps

Just clean it with plain warm (not boiling) water, using an aquarium scrubbing pad to get all the dirt, sand, lizard dung, etc., off the glass, bottom, and corners. It's amazing how much gunk can lurk in the corners.

Then test it for leaks before you use it for fish. Keeping a land animal in the tank, you wouldn't have noticed if it had small leaks. Fill the tank all the way up with water, and leave it for a few days to see if the water stays in it.

yes clean it really well and it should do just fine!!