i now have seen you live in montreal basslover sorry for calling you a yank!!! lol no offense to you, i am going off what aqualog and a few other books are saying is that rays have a higher rate of miscarriage with temperature around 30 where as tempertature between 24-26 are best and they are fine with temperature down to 21 with no sideaffects to the pups, and as a temperature of 30 is very low in oxygen levels, and carbon dioxide so both plants and fish dont benefit. so ifg you have a sick fish at 24-26c you can add salt and raise the temp to help them recover etc etc, but if you have your tank in the high 20s/30c how can you raise the temp any higher tahn that to help them recover with meds? they might die from the high temp and lower oxygen levels, but this is my opinion and it has worked for me.
basslover i would like to know what you do with sick fish and an already high temp it would be useful to know and i might change my tank temp if you can persuade me lol,
by the way the thing about being economically friendly was a jokeLOL, nobody is regardless of how much recycling you do!!! hahaha