"tropical freshwater plants" wrote in message
...
Thanks to all for the excellent responses - I have set the CO2 bottle in
place and is bubbling away - new stronger lights have been ordered.

I suppose my only remaining puzzle is why a company like Juwel (my tank is
a
Juwel Rio 240) include carbon impregnated pads in their filter systems if
they are detrimental to good plant growth and aquarium conditions
generally?


Carbon is good in a fish-only tank, as it removes a lot of toxic substances
from the water. It's only a problem in tanks with plants or live corals.

Limnophile