Supplementing DIY CO2
I'm looking for some recommendations on supplementing my DIY CO2 on my 20 gallon. I have a Hagen Nutrafin system that's been running for almost a year. The system just hasn't been as effective as I expected, but I've recently made three adjustments that seem to have improved things. First, I used a higher quality wine yeast. Second, I shortened the length of my CO2 tubing. Finally, I removed a few val plants that had crept up on my CO2 ladder and had been causing a logjam for my bubbles. It appears both these adjustments have resulted in better output as well as more tiny bubbles crawling up the ladder. Ultimately, I plan on getting rid of the ladder and will be diffusing the CO2 with a Hagen Elite filter.
With that being said, I still feel like my tank isn't getting enough carbon, so I'm looking at 2 options:
1. Dose Excel.
2. Add another bottle of DIY CO2.
My goal is to get better growth and eliminate algae. The algae I have isn't too bad, but I feel like I wouldn't have any at all if I had enough carbon in my tank. I know that dosing Excel would certainly help with the algae given the fact that it's an algaecide, and I'm wondering if anyone else woh uses DIY CO2 also doses Excel.
As for adding another bottle, I would ideally like to get another Hagen Nutrafin canister, but I don't know that I want to drop another $40 for a whole new system. I was thinking of just adding a soda bottle, but I'm not sure if this would create issues since it would be bigger than the Hagen canister. At any rate, I'd appreciate some advice in terms of choosing the best method of increasing the amount of carbon in my tank. Thanks.