I have a 5 gallon tank with a 26 watt warm CFL hanging about 2-3 inches above the tank running 12 hours a day. No CO2, no ferts. Substrate is just a thin layer of eco-complete.
Only plants in the tank were 6 riccia stones, 1 subwassertang stone, a couple marimo balls, and a little bit of java moss. Only live stock were about 20 cherry shrimp.
I set up the tank about 2 weeks ago. The riccia already had a little bit of algae on it before I attached to stones, but it looked different (not as hairy) and it seemed like the cherry shrimp were nibbling at it. I then left for about 10 days and came back to short hair algae on the walls and on the riccia with some long hair algae on a couple riccia stones.
Things I've done so far:
- Scrubbed the algae off the glass and did a couple water changes (probably about 75% total).
- Moved riccia stones to the bottom of a 15 gallon tall tank that has DIY CO2 (two 2L bottles that are about 10 days old, but still green on drop checker). Lighting is 48 watts of T5 HO with the fixture resting on the tank top. I have some 3 amano shrimp and 2 siamese algae eaters in this tank, and I'm hoping they'll nibble on the algae.
- I dipped 2 of the riccia stones in hydrogen peroxide solution (about 2 mL of 3% peroxide onto riccia in 200 mL of tank water) for about 30-60 seconds seconds
- Rescaped 5 gallon tank and replanted with amazon sword x2, crypt walkeri x2, some water sprite and anacharis, small short stems of rotala and ludwigia, big hunk of xmas moss. My goal is to eventually have the riccia back in the 5 gallon tank and i'll remove the water sprite and anacharis. Light changed to an 18 watt CFL hanging about 8 inches above the tank. Changing light period to 8 hours.