Originally Posted by Fishlover3578
Checked my dads tank his nitrate is down to 40 but he did lose another fish .... He doesn't seem to care much I keep telling him he needs to do more water changes ... Sigh he has two glo fish tetra 3 black neon 1 guppy and 2 zebra danio left... What is chance any will live... Originally his tanks nitrate was at 180 1st time I tested it a few days ago after he said his fish were dying off ...
The zebra danios and the glo lights should be fine. If the nitrates stay down the black neons should be okay too. Once the tank stabilizes I'd add 2 more black neons so they are happier. (Also- neons will school with neons. You could even add regular neon tetras and gold neon tetras and have a "mixed" school of neon tetras!) They like to be in groups. What size tank is your dads? Since you feel like he doesn't care much for his tank- a good idea may be to slowly begin doing the maintenance for it and caring for it. It could end up that he just lets you take over the tank completely!
I suggest doing a 50% pwc
to get the nitrates closer to 20. Less nitrates is better for the fish and will also help keep algae from growing.