Does he look healthy?

Tank parameters:
Ph: 6.4
Tds: 187
Temp: 78 f and 82 f
Nitrates: 5 ppm

They're in separate 10 gallon tanks one tank has 4 dwarf pencil fish and the other has 2 German blue rams. One has an aqua clear hob and the other has a sponge filter and a small garden pump to provide flow.

I've been noticing a lot of poop from one of my plecos. Can they eat cattapa leaves? cuz I have some in their tank to buffer the water.
Also how do you send photos

I recently ordered 2 l128 blue phantom plecos. They came in just fine but they refuse to eat anything. I tried feeding them cucumbers, a mix of repashy Soilent green and morning wood, and new life spectrum algaemax wafers and still no luck. I'm afraid they won't last much longer.