I posted a while back about my loaches. One, I didn't see for a month and a half, so I had declared him deceased. The other got injured with a rock while I was cleaning plus he already was not doing too good due to the pH and having trouble with our gravel. With his injury, he wasn't able to eat much either. He had a strange pinch in his neck and could not swim with direction.
I QTed the injured guy, treated him with some melafix (watered down the dose). Once his injury didn't seem inflamed, I returned him, and we worked on the pH. I started adding Blackwater Extract, slowly, and eventually got the pH down (from 7.6 to 7.0) and he lost his erratic swim and the crick in his neck, so I'm thinking that was neurological somehow related to the pH. He still had trouble with the gravel though, and his fin just was not healing.
So then we swapped over to sand earlier this week, and lo and behold, the day before we did that, out pops the MIA loach. He wasn't dead at all, he was hiding somewhere, growing fat. Once we swapped to sand, the injured one bugged out and hid in the sand (probably still feels under the weather/threatened so skiddish) while the healthy fat one, he just lounges around like a boss all day long. He loves the sand too, digs in it, explores, just swims around. I only see the injured one about every other day, but he is looking better, packing on weight, and his fin is growing back somewhat.
We have some buddies ordered for them (I already listed them in my siggie lol, all named after Tremors characters). Can't wait for them to get here!