Starting my adventures as a aquatic plant hobbyist, I'm beginning to feel that my plants are in need of a growth boost. So I think about a CO2 system. Is there any way of adding CO2 to the tank without any complicated and expensive CO2 tanks? Any possiblity of using yeast or Alka-Seltzer? It seems to be an economical option. I only have a couple of plants in my 115L tank. Any plans to make such a system? Thanks.
If you only have a couple of plants in your tank, I really wouldn't bother. Infact even if your 115l was heavily planted I still wouldn't bother. The best way of boosting plant life for the cheapest prcie and least hassle is to add fertilizer to the water.
Either, whatever you find easiest. In my community tank I use JBL liquid fert and a nitrate supplement substrate (also JBL) which lies under my sand, kind of like a compost. The combination works wonders.
Yeah i know how they work, i would just recommend against it for a tank that small. It isnt really worth the effort compared to ferts. I had this same disicion to make and chose against C02. My plants are doing great with just the fert.
I would seriously advise against listening to much of that article you linked. I too read that and, after a bit of research, I found it would cost near to £50.
However, some of that stuff is very good, and he explains the science behind it well. Only 1 2ltr bottle is necessary for a 115ltr, and the diffuser he shows is very expensive. Check out the TFC page for more ideas.
To make this work, you don't need the diffuser, and you don't need the reactor, just the 2ltr bottle and air tubing! I modifed the plans to be used without the reactor or expensive hand-made diffuser. I will use an airstone even though the author advised against it.
Here's a cropped picture of my "modifed" plans. The right of the black line is what I will be using. The left side I just scratched out. See, no diffuser needed!