Problem:
I have noticed that some of my discus have started to flick and scrape against the plants. Is there some body parasite/fluke? My RSG also goes through episodes of becoming really dark...then lightens up again... ??? just doesn't look right.....??? =(

I have nine 2-3'' discus in my 4ft tank. Using an AquaOne 1000 with spray bar and a sponge filter+powerhead. I have to get my water tested today but I am confident it is safe. The pH is 6.6.

I am not using an airpump because they are really noisy....problem?

Current Management:
I have raised the temperature 30C and added about 5 tablespoons of salt altogether. I have also changed 25% of the water and intend to do another 25% tomorrow.

Anything else I should or shouldn't do?

I don't want to resort to using too much medication... and I hate staining the rubber in my tank green. The following is a list of medication I have managed to stock up. Any useful atm?

Meds in stock:
Pimafix
praziquantal
trisulfa-tablets
Aquamaster Multi-cure
tetracycline

Waterlife: protozin/myxazin/sterazin


I have had bad experience of knocking off all my fish once because of poor management. Hopefully you can help.

Thanks.

skoom