You can try adding some cycle to see if that helps. The results (or lack of?) might be worth noting down.
Aside from that I'd recommend some Indian fern floating in the tank.
A must read!
http://www.practicalfishkeeping.co.uk/content.php?sid=4080&utm_source=PFK_newsletter&utm_medium=email&utm_campaign=July_1_2011&utm_term=Carbon_in_the_planted_aquarium:_Gas_vs._liquid&utm_content=html
I got back from work and cleaned one of my 405s on the planted tank.
Impeller cover broke - one of the clasps came off. Gah.
Least there is adequate filtration on the tank, because this will take the best of 7 days to fix (new part order).
Gah. Looks like I ordered a mister instead, and it's the wrong size. So does any one want to buy a mister for $25 including shipping? :tears:
It suits tanks upto 300L and can only be used with pressurised CO2.