"william kossack" wrote in message
...
I have a powerhead with an underground filter along with a penguin 330

Growing plants with a UGF is never easy - Oxygen rich water flowing over
their roots, most don't like it much.

You could think about using some small pots to get around this or ditching
the UGF - don't just turn this off though - all kinds of bad things an
happen! You'd need to pretty much tear the tank down, clean it out & start
again.