Here is my problem, I have been trying to get my diy yeast co2 to produce enough co2 to give me roughly 15ppm but with no such luck.
I have been using brand new Flieshmans yeast and C&H pure cane sugar along with my tap water which comes out of a filter that is filtered by some special activated carbon and has a ph of 7.5 so it is a tad hard.
Here is what I have tried:
The first time I tried mixing 2 cups sugar with a 1/4 tsp of Yeast and filled the 2 liter bottle to within about 3" from the top. Waited about 3 days and was getting about 6.641 ppm of co2 (which I got from chucks calculator using the ph of 7.5 and the kh of 7). I have the return line for the co2 going into my tetratec hob filter inlet. When I look at the line pumping co2 it seems to build up enough pressure to push a almost stream of co2 every 30 seconds or so.
The second time I tried the same as above just to make sure everything is okay oh and btw I make sure the water is pretty tepid and I shake it for at least a minute before attaching it.
The second time I adjusted the recipe a little this time I added 1/2 tsp of yeast to 2 cups sugar and filled the bottle with tepid water to almost the top and after 3 days, get the same results as before.
The third time I tried mixing a 1/4 tsp of yeast with a 1/4 of sugar with just enough water to make a semi thick mixture in a seperate container, I let that set to the side for 15 minutes. Meanwhile I mix a 1/4 tsp of yeast with 2 cups of sugar and about 6 cups of water or about halfway to the top of the two liter bottle. I then shake the hell out of this mixture for about a minute, cap it and wait till the original mixture is done. Then I recombine them and shake again for over a minute and attach. Again with the same results as before!
I know some co2 is getting in their because some of my plants are pearling, the anubia pearl like crazy, while the sagitaria, corkscrew val, and rotala macranda pearl a bit (I mean a bit). Also I can see tons of bubbles leaving the plants and collecting on the surface. So I guess the co2 requirments of anubia are low or could some test be off?
Or because my water is hard should I be mixing diffirently?
Or should I have two bottles on the tank?
It is a 29 gallon tank. with about 50 lbs pea gravel that has been in the tank for over a year and has a nice amount of mulm in it.
Thanks for any advice on this!
29 Gallon Standard Moderate Light Planted tank
Lighting: 2x27 Watt 6500k P.C. Lights of America Outdoor Fixtures. 2x 20 Watt N.O. Flor. w/ Sylvania Gro Bulbs (9350k I think). Both are retrofited into a diy 12" tall canopy, with a 4" Diameter Clip on fan facing the opening in the back to circulate the excessive heat from the lighting.
Filtration: Tetra Tech 150 (modified to make very little disturbance.
Aquarium Systems Mini-jet for more circulation.