Hi all,
This was what <"Ma, A: Daniels, E., Gulizia, N. & Brahamsha, B (2016) "Isolation of diverse amoebal grazers of freshwater cyanobacteria for the development of model systems to study predator–prey interactions", Algal Research, 13, pp 85 - 93"> say:
cheers Darrel
Definitely the little guys.but the balance certainly starts from the bottom, with the little guys.
This was what <"Ma, A: Daniels, E., Gulizia, N. & Brahamsha, B (2016) "Isolation of diverse amoebal grazers of freshwater cyanobacteria for the development of model systems to study predator–prey interactions", Algal Research, 13, pp 85 - 93"> say:
I know (from squeezing out filter sponges, and looking at the debris) that you get a <"wide range of protozoans, rotifers"> etc...... In the environment, eukaryotic grazers feeding upon prokaryotes shape microbial population structures, playing an influential role in food web dynamics. Natural grazers of cyanobacteria include small crustaceans, such as copepods and Daphnia species [16], [17], and protozoan grazers, such as amoebae, ciliates, heterotrophic flagellates, and mixotrophic flagellates [18]. In environmental field studies, ciliates and amoebae were associated with large reductions of cyanobacterial populations, and grazing was confirmed with feeding experiments [19], [20]. Amoebae in trophozoite stages generally crawl along surfaces through eruptive extrusion of pseudopodia, and many species feed by interception and ingestion of prey through phagocytic mechanisms. A notable exception is a group of amoebae called vampyrellids [21], which perforate cells and ingest the cytosolic content of prey species, which include algae and cyanobacteria [22] .......
This might also be a reason for <"retaining some mulm"> in the tank, as a refuge for amoeba etc.If you want to have a "trial run" to see your fishes response to live rotifers, filter sponges are a great source. Just squeeze the sponge out into a beaker, and then give it a good swirl and you should be able to pipette (pipettes from here: <http://www.ta-aquaculture.co.uk/Miscellaneous.htm>) the rotifers out of the central vortex without getting too much mulm etc.
cheers Darrel