Probably not, but keep an eye on ammonia and O2 levels for a couple weeks or so to make sure that it is safe. Ammonia, you can measure. O2 can be measured, but it may be better to just observe your fish for signs of O2 distress.G'day, I have a heavily planted nano with a sponge filter and DIY CO2. I have run nano's without filters before with no issues but will there be an issue with turning off my filter during the daylight hours to help trap CO2?
Cheers, that article is really fascinating. I turned the air sponge filter right down, and am getting some surface agitation and minor circulation (takes a small leaf 1 min to travel length of tank at mid height)Here is a good article on the subject: https://www.advancedplantedtank.com/blogs/choosing-co2-why/how-to-push-the-limits-of-co2-safely