What is this possible parasite called?
I don't have the capability to quarantine it in a separate warm water tank. Can I just place it in a plastic container and treat it ? Thanks
I wouldn't actually jump to thinking internal parasite at all. I suspect that may have come up as you'd lost a cory a few days before? If there were indicators on the cory or BN of parasites - itching on rocks/decor, constipation or white stringy poop, lethargy, bloating - I may have thought parasites. If he were parasite infected, normally the entire tank would be treated for parasites &
Paraguard at a starting low dose is according to its manufacturer, safe for cory & BN.
But given that his belly is concave, there were no other reported symptoms & it sounds like he scavenges for food, I'd think he was malnourished. If that's the case he needs to eat high quality, protein rich food ASAP. As they mature plecos need a steady meat, as well as vegetable diet. You can try softening a slice or two of zucchini, spinach - basic fresh greens if you have them - sticking them on a clean fork & sinking it carefully near the pleco to eat tonight.
I don't know who else is in the tank with him, except
corys & he'll compete for food with them. Expect them all to tear into whatever protein or veg you feed tonight. There will need to be enough to feed both pleco & corys. You'll have to pay attention to water quality, removing uneaten food & doing regular
water changes while you're essentially over feeding the tank.
If you can get to a LFS (local fish store) tomorrow, I'd look for Paraguard (or another anti-parasitic that says it's safe for cory & pleco), frozen food & high quality
sinking pellets/wafers for omnivores, like
bug bites.
Unless I saw obvious signs of parasitic infection like those listed above or white spots associated with
ich or
camallanus, I'd feed first.
Hope it helps.
Just saw the added photo - thank you! Are his scales sticking up all around his body? Is he normally this colour or has he paled? That tummy should definitely be rounded rather than concave. Poor little guy.
I'm thinking that it might be helpful to fill out the
emergency template (you can copy & paste from the link) to give folks a better picture of what's going on. Better to make suggestions with full information.