Dennis-Pir said:
the clown loach that is left, as well as some of the tiger barbs in the tank have funny white sort of spots all over them, and they look like they are losing their colour
EDIT: Are the spots like salt granules, or are they fuzzy?
If they're like salt or sugar granules, then everything I wrote below applies to your situation (But, if the spots are fuzzy, then it's fungus, and you'll need to go a different treatment route):
This sounds a lot like ich to me. Did the clown loach and bala sharks that you lost also have these symptoms when they died?
Any chance of posting any pics of this?
Based on what you wrote, I'm thinking it's ich, so I'd go ahead and up your tank temperature to 86 degrees F. I successfully got rid of ich by doing this
AND adding about 3 heaping tablespoons of Doc Wellfish's Aquarium Salt (designed for freshwater use) into my 12 gallon tank. That means you should probably use about 6 heaping tablespoons for your 25 gallon tank.
(Note that many sources recommend higher salt concentrations...The figures I'm telling you are based on
my own personal experience with having successfully treated ich in one of my tanks). You can always add more later if you think it is necessary.
If you're not familiar with it, the salt comes in a milk-carton type thingy that's pink and white...just look for that at the pet store.
Please explain what you mean by this:
Dennis-Pir said:
I think the reason the others died might have been the heat, as it looks like my tank was too warm.
How high was the temperature at the time?
I'm still thinking it's the ich that's causing your fish losses, so I'd go ahead and treat the tank accordingly. The 86 degrees F and the salt treatment won't hurt anything (even if it is NOT ich), so don't worry about that---you need to get this treated A.S.A.P. (actually, live plants are the only thing that might be affected adversely, but I wouldn't worry about it if you wanna save your fish).
Hope this helps. Good luck.
Big Vine