Hello

I'm using a Penguin Mini Bio-Wheel on my 5.5 gal tank (one betta, three
pristellas). Recently I added some plants to the tank. Initially I put there
some cryptocorinas and an amazon sword, which seem to be doing very well.
(Amazon sword quickly put out two large "submersed" leaves and more are
coming.) Later I attached a small anubias to a piece of african wood that I
had for a while, and also planted several strands of glossostigma in the
gravel (this one, as I heard, is very demanding and high-maitenance, so I'll
probably end up replacing it with something else later).

Now I'm thinking about trying some DIY CO2 injection, since things seem to
be slowing down (I'm thinking about maybe using that Hagen's Nutrafin bubble
counter with a homemade CO2 source). However, I have some doubts about
whether the whole thing makes any sense as long as I'm using the
aforementioned filter. The filter's outlet is pretty much a waterfall and it
provides some rather intensive surface agitation, which will lead to CO2
escaping from the water. Do you think that it will boil out so much
dissolved CO2 so quickly that the entire injection setup will have no
positive effect on plant growth at all?

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Best regards,
Andrey Tarasevich