Hey Chris, wow... what a bummer for you. I cant offer any help on the neons dying except i know some fish shops dont have the tank space to quarantine fish before selling so therefore just sell once theyre in their tanks. (I guess they should have warned you they were in the day before) , Also - these cute fish do get whitespot quite easily due to stress of moving tanks etc. The gel blobs are snail eggs. There are quite a few ppl on here that use janola to clean tanks and gear, then i believe they place the tank in the sun. Bit hard with a huge tank, but the sun is good for drying things out. Also if youre worried about the janola, vinegar neutralises it. (then you'll just have a vinegar smell). Good luck.