I think $2 is to much for Reg BN. I paid $3.00ea for six 2" Albino BN
Or you could just drip acclimate your fish and avoid this all together...I apologize if you know this but it is not considered a good idea to put breather bags underwater since they don't work underwater and eventually the fish will suffocate. It looks like you were just acclimating them for a few minutes but I wouldn't leave them in much longer because they will run out of air since there is no air trapped in the bag like a normal bag.
