yesterday I noticed the snake head swimming really odd, up and down and size to side, looked like something neurological or something, didn't look like he was using his tail fin anymore either, just the side fins and spinning in the current in my tank instead of stabilizing himself like before, this morning I wake up and check to see if hes doing better, and hes dead. I did a water test yesterday and my water is hard but everything else is good, well nitrates where high but I did a partial water change, and all the other fish are great, I guess I must have gotten some infected feeder fish and he got sick and died on it? anyone had this happen?I called the shop today and no channa came in and hes not sure if he can get anymore..... freaking hell.... back to the drawing board, called another guy I spoke to before getting this guy, he said hell check his suppliers today and let me know tomorrow if he can track some down for me. Ill find out tomorrow, said hes got some suppliers who ship to him every week from china and tialand and he thinks he might be able to track down some channa but not sure which.
I see your micropeltes were very young babies (red line still highly visible) and at this stage of their life, they are very delicate, falling sick easily and sensitive to water conditions. I think what you did wrong was the hard water. I do not know what other conditions that little guy lived in but it is important to make things as stress-free as possible.
Some things I would NOT do:
* strong water current
* deep water
Water should NOT be hard. pH should be slightly acidic to neutral (7.0). Life food would be great but not goldfish and be careful of diseased feeders. Size should be small enough for the snakehead to EASILY swallow.
No mater high good is your aeration, how much dissolved oxygen in the water, the little snakehead still needs to come up the water surface to gulp air. Micropeltes natural environment is not one of strong current. Juveniles would find it very tough to swim against constant strong current. It's plain torture.
If you have one or two babies, a small plastic tank will fine but needs daily water change (if there isn't any filter) as they poop a lot . Water should be not have chlorine or chloramine.