Originally Posted by Lupin
Mixing gouramis and bettas is a risky business. I wouldn't do that. If you have a glass store there, they may help you fix the crack of your tank.
Originally Posted by PLECO
my 20 gallon i found out was cracked so would my lfs be able to order a pice of glass 4 the bottem and reseal my tank. also the guy at my lfs said the gormi would do fine with the betta and the gguppys should 2 because my friend had his in with his betta i juest i wont now till i get them
I wouldn't recommend trying to repair it yourself. If your LFS won't replace it under warrenty (not sure how it was cracked), a local glass shop might help, but make sure they use aquarium safe sealants.