When you damp start fissidens do you just lightly mist it from time to time? Mine had a tendency to grow algae as well. Either too much water (it had surface tension globs on it) or too long light period 10-12 hrs. My guess is the latter. Heres a picture of it now- I've beed daily dosing with Excel.
https://www.flickr.com/photos/129377489@N05/15759076594/
When you damp start fissidens do you just lightly mist it from time to time? Mine had a tendency to grow algae as well. Either too much water (it had surface tension globs on it) or too long light period 10-12 hrs. My guess is the latter. Heres a picture of it now- I've been daily dosing with Excel.
https://www.flickr.com/photos/129377489@N05/15759076594/