Bro, that is a nice Magnifica.
He's sick, and I can promise you that. 100% sure because H. Magnifica's are mostly all I keep other than S. Gigantea.
He needs to be treated ASAP. Cipro is the best drug for mags.
250mg per 10/G. 7 full days of treatment with 1-2 water changes daily. Change water when it gets cloudy.
Turn ur lights off for the first 24 hrs. Then low for the next 12, and start increasing after that.
I can almost promise you that this one will make it and respond to the antibiotic.
How long has the tank been running? Do you have 5/g or 10/g hospital tank with small powerhead and heater?
Text me if you need advice or for any questions and I can help you save him. I hate when mags die. He's very nice!
713-504-2100