Spots on leaf

hey there PartyBoy, what i'm seeing is a collection of diverse, unrelated symptoms, upward curling, downward curling, discoloration , spots, on the sides of the leafs, strage wrinkles, etc... that's from pH fluctuations inside the tank. The good news is that for you it was "light". The affected areas will probably not recover but basically the hydroguard probably couldnt buffer the pH for a small about of time it raised the pH, then quickly lowered it causing these symptoms. It's basically a freak occurence, and there's nothing you can do with your current set up to make sure it doesnt happen again, except verify and improve all fixtures, pipes and especially tanks so there is absolutely no light going there , keep the temperatures stable, keep adding hydrguard. And i'l quite sure you're already doing this, so keep doing what you're doing, and that's it. Hope this helps ! 🚀