I think my bamboo shrimp is dying! Can I save him?

He is bright red like the color when other ones died the first time I tried them. I fixed my water levels and tried again and he had been doing really well for like at least two weeks, even though the other one I got died. I put a little fertilizer in today for the first time since I got him, and tonight he was swimming funny, trying to get up higher and laying on his side.

I did a partial water change, added some conditioner that helps with amonia, nitrites and nitrates, and I changed my carbon filters, just in case it was from some sort of mineral or metal. I put him in a net up high under a filter outlet and near where the bubbles from my bar break the surface hoping he will get more air. My green, cherry shrimp, and vampire shrimp all seem fine, with some little babies shown up in my dwarf shrimp breeding box. The bamboos have always been sensitive for me.

I really don't want him to die.

He died. It was like a lobster red, his strip had disapeared, before he was more of a brick red.. I'm really sad. I don't think that I'll get anymore.

My tank is large and well established. Like a 45 gallon and my vampire shrimp do just fine. I've only had trouble with the bamboo. I fed him powdered flakes he would catch and he would filter over the algea pellets I drop in. He was pretty big though. A large male. My females and smaller ones always died too. I don't know that people have as much success with them around here that I have heard. Our water is really hard as it is, and the rest of my stock doesn't mind it. He did really quite well before he died, standing up on the spawning mop by in the current, or at the top of drift wood.

I think I some point I may try again and do some different things, But I'll probably take a break for a bit. My vampires are happy though. Dark little hidey things.