I'm interested in boosting or adding these microorganisms that otocinclus and other fish like to graze on. I'm curious how you know or ensure you have them.
I do have a decent amount of algae growth on my glass and around the tank, and lots of plants. I just don't know if this environment is sustaining a sufficient amount of what aufwuch feeders are looking for.
Could I introduce more by collecting rain water and adding to my aquarium?