the first puffer i had was a dogface he died because ammonia spiking and everything that follows (warning when you set up a new tank ban everyone in the house from touching it lol)
i waited a year before i was brave enough to buy another one.maybe he was sick from the get go i dont know he liked to hang around the filter and the powerhead,with his mouth,looked like he was kissing it.i didnt notice anything on him,i think he got too stressed.when i get my 55 gal
ready i will be waiting at the door before the owner gets there to snatch him.lol
as far as the water quality the only problem i have noticed from tap is brown algae.my snails are doing a decent job of cleaning it though.but i'm scared to use it in my 55gal i plan on buying more expensive fish,hate to see em croak after a week kwim?
thanx for all your help you guys are great!i learn something new everyday