lmao...that pretty much sums up why I don't offer a whole lot of answers...have lots of theories, just finally have the space to actually test some now. Building a tank in the basement to wall off a room opening of 102" and it will never make it down the stairs assembled so I have to seal it with something not too toxic. Really want to use the liquid rubber but just trying to predict the downfalls before it's actually applied. Currently have my pike's growing out in a 55 (still babies and schooling together) and I keep their pH at about 6.5 but we have pretty close to neutral water here in Winnipeg so I just hang a bag of oak leaves in the filter discharge to cut the pH...I'd hate to have to try and maintain 400 plus gallons at 6.5 with chemicals or CO2. Forgot to mention...thanks for all the responses, info's greatly appreciated.