[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Dave G wrote:
> One dead fish, especially a big one, can dump a lot of nutrients
> in a tank in a matter of hours. This is why it is a good reason
> to have a ugf under your gravel, even if it is turned off.
> Sometimes you need it.
Isn't there some danger in turning on a ugf that hasn't been used
for a long time? It can throw up a lot of anaerobic detritus, right?
I like ugf's. Who invented them, anyway?
Cliff Lundberg ~ San Francisco ~ cliff at noevalley_com