Well I guess I'll have the best of both worlds. I've got to top off with well water to keep volume at max., and in turn it will cool a little also. I definately areate also, have been running a 4500gph fountain all summer, it seems to do a good job, but a little pricey (6.3A at 120V). I received my DO2 meter in the mail yesterday, no more guessing on next summer's hot days. If 5.0 is the absolute min. for DO2, what is a good level on a hot summer day? Anything over 5.0 I guess! Just wonderin'........................Budster
