how long can dt sit fishless

[onemako]

I set up a dt 20g for a friend to put 3 fish in so she could start slow. tank has cycled and params look great. Just as we were about to add the fish she got called out of town and tank will have to sit for 3 weeks. Is it going to need anything to keep it steady. Has sand bottom, no rocks, hob filter, sponge aereator filter. thanks

 

[Spare time]

Its fine. If you want, feel free to put some fish food in there.

 

[onemako]

Its fine. If you want, feel free to put some fish food in there.

thanks, I was considering just adding a couple clowns, but basically wanted her to pick her fish.

 

[DrMMI]

I went fishless for 109 days while fallowing my tank a few years back. It'll be fine.