[gpodio]

Seems like too much surface agitation... I haven't used these on planted tanks, but have the "other" mod kit in my reefs and they have a ball joint which allows you to point the powerhead in any direction, I think if you were able to point it downwards to reduce surface agitation you should be able to reduce the loss of CO2. Otherwise erogate more CO2...

Here's the kits I use

Hope that helps
Giancarlo Podio

 

[gpodio]

Considering the cost of buying the kit with adjustable mount you may just want to see how much more CO2 you would have to erogate to bring the levels back to where you need them...

With some heat you may be able to bend the existing mount too...