So the Clear treatment has been going well. It's a little tricky to get the syringe far enough into get to his stomach as this isn't a large fish. Today till be the 5th day and I've already seen improvement although, he's still showing a little white poo.
The large fish sadly took a turn for the worst! He was doing great so, I was giving him a chance before moving him to a hospital tank to treat with Kanaplex. Then suddenly, a couple days ago I woke to found him vertical in the corner with a shrunken KOK. He's stopped eating and just hangs in vertically in the corners or hovers on the bottom. He can still swim but he clearly isn't OK. I then saw a long string of white poo (although it may actually be stomach lining from not eating for a couple days) hanging from him. I immediately checked his water and did a 30% change as I found the Nitrates were a bit high (20-40), but I'm not sure that alone would cause this, all other parameters were really good and I've been changing water a minimum of twice a week (plenty of bio media in the tank to avoid breaking any cycle).
I moved him to the hospital tank last night and am trying to figure what I should treat him with. I have multiple medications but as I'm unsure what the problem is I'm not sure of the best path forward. I can treat him with the Kanaplex, as his eye looks a little hazy, or treat him with MetroPlex or Clear for Heximita.
Attached a few pics, one of the larger FH and a long string of white poo, one of the smaller fish with a little stringy poo (after 3 days of clear treatment, you can see the bright yellow excrement in the background), the last is my nitrate test (the yellow vial on the left is from a spare 60gal tank I use for water changes, note low Nitrate, the red vial on the right was from the larger FH tank when I first discovered slightly elevated Nitrate).
Thanks as always for any advice anyone can offer, I would like to make a choice on treatment today so things don't get any worse.