In my 38g, I've always wanted a schooling fish, the one that looked nice to me was the black phantom tetras. Since I started with a school of 6, I have spontaneously lost at least that number for no particular reason weeks after I've purchased them with no warning signs or markings at all. The other fish in the tank, BN pleco, pearl gourami and striped raphael all seem fine as well, and they have been there long before the tetras.
My parameters are good and and 50% PWC
's are done every 2 weeks. This has been going on for a while, I was down to 4 of them and brought my school back up to 8 where I have since lost 3 in as many months. Is there anything about these guys I'm missing, any particular sensitivities or needs...I don't think there is?
A while back I posted about tiny, transparent organisms living in my gravel substrate that I concluded were nematodes. When I vac my gravel they float up into the water and the tetras have eaten them before. From what I read at the time, I didn't think this was a problem or that the nematodes might be the cause of the deaths. I have since cut down the feeding in an attempt to thin the nematodes out.
Could these be the silent killers? I'm really baffled at the deaths and I'm considering switching to another smallish, schooling fish.