mark456
Fish Fanatic
hi, i have just got a small hospital tank from my friend, but i am not sure what filter to get, can anyone advise me please, thanks 
I'm not the best at this, but I was trying to figure out how many gallons it was.
Do you live in the US, UK?
I know in the US there's this brand called Wisper. if you get the 5G filter, you can ajust the filter flow. That way, if you want a larger current, or you want alot more water pushing through the filter, you can.
Its nice that you can ajust it and not have it on one speed.
If you live in the UK, I can't help you, sorry.
All you really need for a small tank like that is a sponge filter, you can get them from most petshops, and you need an air pump to attach to it.
Ill see if i can find a photo if you want one.
there i added a pic link. i got from pets at home if you have one of those near you, with a small air pump and some airline tubing, there simple and easy to clean and good for a small tank, i use mine in my 4G betta tank
the sponges are cheap, although you need to get an air pump if you don't have one already. Good and quiet air pumps can be a little pricey, around 20$ here in Canada for a 5-10 gallon pump