20 high startup

[Cz1989]

So I’m setting back up my 20 high, (it’s been in my attic for over a year).   My girlfriend really REALLY wants me to do a pea puffer tank.  I plan on planting really heavy with stone vertical hardscape as well.  
 

I have several questions; 

1. Is a sponge filter sufficient flow? 
2. Would 3-4 pea puffers be too many in this setup? 
3. any tank mates whatsoever? 

[FrozenFins]

Cory recommend one pea puffer in a 5gallon and one more pea puffer for every additional 3 gallons, meaning that you can do 6ish pea puffers in a 20high. I have a spongefilter in a 40 breeder with no issues, so one in a 20 shouldn't be a problem. But I guess it depends of the size of the spongefilter.

Heres a thread for pea puffer tank mates:

and here are some videos for pea puffer tank mates:

 But to be honest, best tank mate for them is no tank mate.

Edited January 25, 2021 by James Black

[Cz1989]

Thanks James!,  I have heard him say that as well, I was just curious of the communities opinions.