Jolly Fisherman wrote in
:

I've only seen the extract in 1 or 2 aquarium specialty shops locally
(different state of course) and it's out of sight. True the shipping

We sell Barley & Peat Extract and it is right up front near the cash on
display--it is pond season after all.



It might take some more time to fall off, then again conditions might
still be such that it is still surviving well and choking the plants
(more likely).

The alga doesn't actually "react to CO2," it just gives your plants the
edge in competing for the available nutrients.



I use Flourish Excel.

I'm not 100% sure Flourish is truly equivalent to CO2 fertilization.
At least I've been reading conflicting things.

Seachem's Flourish Excel is not carbon dioxide; it is an organic carbon
compound (primarily polycycloglutaracetal) which serves the same
function for plants. It skips an intermediate step filled by CO2 in the
process of photosynthesis to provide plants what they need to produce
long chain carbon compounds. When you use Excel, plants don't need to
use CO2 to photosynthesize.



I just ordered "Algae: A problem Solver Guide" - Sprung. Maybe
others have reading recommendations that have helped them they can
endorse?

This is a good book--I sold a copy to a customer today, but if it is the
one I am thinking of it mainly tackles problems with marine algae.
While the conditions for avoiding algae in both situations are very
similar, there are some options available to you in fresh that are not
in salt and vice versa.