1) with your lily pipe, all you had to do was raise it up to break the Surface area. I do this every night with mine before bed. For Oxygen Exchange, and to remove Surface scum.
2) do you have Shrimp in this Aquarium of yours, if so it is important to have bio film in your Aquarium, it is their main source of Food.
I have bio film growing on all 4 sides of the Aquarium, I only clean the front of the Aquarium for viewing.
3) What are your water Parameters, how much light are you using. Are you dosing any ferts?
4) What is your plant mass?
I don't have shrimp in it now, but that's the plan. I did have 4 amano shrimp in there (1 adult I transferred from my other tank, and 3 juveniles), but they all died mysteriously. see: https://www.plantedtank.net/forums/88...infestati.html
Still don't know what the cause was, but am operating under the assumption that a lot of algae died all at once and it caused a nh3/no2 spike that killed the shrimp. I've testing the tank and everything seems to be back to normal and stable.
0 nh3, 0 no2, ~5 no3, 11 gh, 6 kh, 73 temp, ~250 tds, 7.2-7.4 ph.
I use a finnex planted+ clip light that stays on from 11 to 5, but the tank is in a room with many windows so it gets a lot of diffuse light naturally. I've been dosing PPS-Pro daily (mainly b/c the nitrates are so low).
The tank is heavily planted: microsword, crypt lucens, 3 java ferns, a bunch of java moss, and 3 varieties of buce.