I am considering co2 for my 29g aquarium that will be planted and have never added co2 before. I have read a lot that Vallisneria does not do well with liquid carbon supplements such as excel, and don't want to kill it, as it will be one of my main plants.
A pressurized co2 system is way out of my price range, and getting tanks filled around here has turned out to be quite difficult (phoned a few places, was told to call other places, went in a giant circle)
So a DIY co2 system seems to be my option. My theory is, any amount of co2 I can get into my aquarium water is better than none at all.
1. I've read most yeast bottles last about 2 weeks, and if left for a third week weaken daily. Assuming my system follows this, and I leave bottles for 3 weeks at a time, how bad would this be for my aquarium?
2. Is it possible to add too much co2 through the night with a DIY system that uses 2 bottles max, and end up killing all my tetras/corydoras?
3. No fish will be added until my aquarium is cycled and everything is stable. Plants are going in on day one. Am I correct in assuming they can handle any swings in the water that may happen during a cycle and testing out co2?
Water parameters out of tap if they help:
PH - 7.7
GH - 3.36 dgh*
KH - 2.24 dgh*
*took 3 drops for color to change on GH test, 4 drops for color to change on KH test. I believe I calculated the right numbers, but could be wrong.
Thanks in advance for any advice or help
have a good one