Flourish excel or CO2?
I would like some opinions.
I was lucky to get a free bag of plants and a small sample bottle of flourish excel from someone for free.
I have a small 2.5 gallon with a single betta, the person who gave me the plants said my tank would probably be kind of deficient in CO2 and I will need to supplement. So he told me to use a drop of flourish excel with my weekly water change. I'm gonnal use it up eventually and have to get more. But I also read you can use a yeast/sugar CO2 mix and it works just as good if not better.
A new bottle of flourish excel is $15 but I think it will last me a long time.
If I make yeast system it will cost $0 since I have everything in the house already but I don't have a diffuser or check valves so it would have to the most simple CO2 system possible with just a bottle, airline tubing and an air stone.
Which one IYO is better? Should I just buy a extra bottle of flourish excel or should make a DIY CO2 system?
I use a 60W lamp as my source of light. Its on about 10-12hrs a day unless I am using it to study.
thanks for your opinion, I am new to plants so I don't know which is better or if its even needed!