Kasakato said:You also have to stop adding any chemical other than Stress Coat. The alage stuff and other chemicals are doing more good then bad. Including salt. Everytime you are adding new water to your tank you need to add some kind of dechlor. In your case you can and should be adding stress coat.
Why do you say they should be adding stress coat? I agree a dechlorinator should be used (preferably one that takes care of chloramines too, just in case), but I don't think stress coat is necessary. Isn't that the stuff with aloe in it? I don't use any conditioner, so I don't know which the best brand is that will take care of both chlorine and chloramine.
The salt won't hurt at this point, and will be a benefit to the fish if nitrites are present. After things balance out there is no need for it.
I suspect that the algae destroyer is in fact the root cause here. Definitely do as many water changes as it takes to bring ammonia down to near 0. Cutting back on feeding is also a good idea, as well as doing some thorough gravel vaccing.