Group of 13 clowns dieing

The Uv is a 36 watt unit with a slow flow.

I still can't see exterior signs of the disease but the bicolor blenny has been restless and scratching in the sand. If tomorrow he continues like that, I will take all the fish out and start the treatment with the chloroquine.
 
All fish seem ok, with the exception of the blenny that scratches his body against the sand and occasionally turns around to pick something from his own body.

What do you guys think is better? Continue to observe or transfer all the fish to the hospital tank immediately?
 
The fish have been in a 130 liter tank with chloroquine phosphate since my last post.

I couldn't find the powder so I got the pills. Each 250mg pill has 155mg of chloroquine and I dosed 15mg/liter (1 pill per 10 liters).

Today the ammonia alert reached the green color (0.05 ppm) and I decided to make a 50% water change.

The fish seem ok and are eating well.

I have 2 sponge filters running but the sponges only had a couple of days in in the main tank so they're not filled with bacteria.
 
The fish have been in a 130 liter tank with chloroquine phosphate since my last post.

I couldn't find the powder so I got the pills. Each 250mg pill has 155mg of chloroquine and I dosed 15mg/liter (1 pill per 10 liters).

Today the ammonia alert reached the green color (0.05 ppm) and I decided to make a 50% water change.

The fish seem ok and are eating well.

I have 2 sponge filters running but the sponges only had a couple of days in in the main tank so they're not filled with bacteria.

This sounds like a good plan. I have no experience with CP, but just ordered some myself.
 
Since my last post the amonia has remained stable, the ammonia alarm stays green (around 0.05 ppm).

It's weird, because I have 2 internal filters with sponges running.

Ok, they weren't mature, but even so, having free ammonia constant through all this time (10 days) it's hard to explain. I have been feeding lightly.
 
Since my last post the amonia has remained stable, the ammonia alarm stays green (around 0.05 ppm).

It's weird, because I have 2 internal filters with sponges running.

Ok, they weren't mature, but even so, having free ammonia constant through all this time (10 days) it's hard to explain. I have been feeding lightly.

The green .05 is too high. You need it to be in the safe .02 zone. You should keep doing 25% water changes daily to bring it down. This will reduce your CP, so you'll need to adjust the dosing accordingly.
 
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