If you buy your fish from a local shop that has the same type of water as you, then you can float them until the temp is approx the same and put the fish into your tank without shop water. If the shop is some way away and doesn't have the same type of water, then I find it best to slowly mix...
If I had a board the same size or slightly larger than the base of the tank, I wouldn't bother about changing the stand. 1- gallons isn't very heavy and if you did have to move it, then just empty out some of the water, not all of it.
Fish normally don't mind the dark, the lights are for the benefit of us so we can see them, or live plants that need the light to survive. If you have no plants, then 4 hours a day is fine.
If you really can't wait for the new base see if you have a strong board that is the same size as the base of you tank. Put this on the stand and then put the tank on that. It will hold like that and there's no stress on the base of the tank.
Oh and what's ICH?
Ich is a disease that looks like fine grains of salt on the fishes body. If not treated it will eventually kill the fish. It's one of the most common fish diseases and new fish keepers often come across it when starting their first tank.
First of all, sorry to read of all your troubles. Secondly can I just explain why a lot of fish get Ich as soon as they reach home even if there is no sign of it in the shop. Ich is present in practically all fish tanks, even the most healthiest of them. Transporting fish, the change of...
Not only are the balas shoaling fish but the clown loaches are also - both types need more of their own sort to keep them happy and both sorts need a much larger tank that they have right now.
There is no need for an extra airstone unless you want one for show. Also if you're going to have a planted tank, then an extra airstone could actually be a hinderance rather than a help.
I have to agree with all the above, the tank is extremely overstocked now and a lot of her fish are going to get much to big for that sized tank. Please tell her to read up on the basics of fish keeping because it seems that she has no idea what she's doing.
Can you advise the size of the tank as I'm not familiar with the one mentioned. Goldfish, if kept in the right environment can easily live up to 20 years!
I suspect that your tank hasn't cycled. A cycled tank will show a reading of nitrate. Please cycle your tank before restocking. Try reading this for explanations on cycling.