Sick discus needs urgent help

[deathemperor]

My discus is getting this on his/her body. It's getting weak and just stay on the same place. I've been keeping her for about a month now.

This is actually the second case, the first case just the same body spots and died very quickly (from sick to dead was about 2 days). They both came from the same fish store.

Water test results: https://photos.app.goo.gl/eoc8bP0cvMS402553

I tested it right after taking her out for quarantine. It's hard to see but overall just the Cl2 is high. Could this be a chlorine issue?

Some tank info:
~400G (1200L) including refugium.
water temp: kept at constant 30 celsius.
water change: 3-4 days.
diet: bloodworm/artemia

[Second Hand Pat]

Is that a raised area in the center of the body. Not really sure what I am looking at. Are you using a de-clhorintor when doing a water change? If it seems bacterial best to lower the temp to 28.
Pat

[deathemperor]

Is that a raised area in the center of the body. Not really sure what I am looking at. Are you using a de-clhorintor when doing a water change? If it seems bacterial best to lower the temp to 28.
Pat

forgot to mention yes that's area on the body. It's getting bigger 14 hours later when I got home from work.

I didn't do de-chlorintor, what should I use to do that?

[Second Hand Pat]

It’s to remove chlorine from your water before you put it in the tank. it can be deadly to fish.
Pat

[deathemperor]

I understand its purpose, I mean where could I get those? Amazon? What brand should I use? Would love to see multiple options to choose from.

[Ryan925]

I understand its purpose, I mean where could I get those? Amazon? What brand should I use? Would love to see multiple options to choose from.

Yes Amazon. Seachem prime is very commonly used. Safe is a more concentrated powder form. I keep an eye out on Amazon as they have sales often on prime

[deathemperor]

But it's actually urgent to cure the fish first then fixing the tank. What should I do?

[Ryan925]

But it's actually urgent to cure the fish first then fixing the tank. What should I do?

Well if you are using municipal tap water with no dechlor that would be your first step. Chlorine is fatal to fish

[White Worm]

If it is just an external injury, you could apply betadine to the affected area while out of the tank. Then, clean de-chlorinated water. You could also use non iodized salt @ 2tbspns per gallon.