- Joined
- Mar 18, 2020
- Messages
- 184
- Reaction score
- 130
So the first 48 hours treatment has reached it's end I still have some stubborn cyanobacteria hanging on in the bad area and a few bits here and there. I want to hit it with a second dose but am uncertain if I need to do the water change first or if it would be better to hit those more stubborn hangers on without, thus increasing the overall treatment strength.