another one i have done was got a 10 gal and was at walmart (first mistake) i bought 3 bala sharks, 3 iredesent sharks, 3 redtail sharks, along with 2 common pleco's and some kind of catfish. WOW what was i thinking didn't clean the gravel or clean anything for that matter set up tank 10 mins later added fish, i do remember i floated the bags in the water for like 5 mins becuse i always heard to do that, needless to say they were all dead with in 3 days, oh the newbie mistakes i have made and all the poor fish who suffered throught it.