too late. sunday morning i saw him sucked up in the filter. he lived a good long year. now his tank must go to good use. could i put 4 black neon tetras and 2 zebra danios in a 2.5 gal tank?
Get a bigger tank. Try to see if you can upgarde to a 10 gallon. Then you can keep some black neons in a nice school and maybe some cory catfish or khulie loaches. A 2.5 gallonis sort of only good for a betta or maybe a dwarf frog.