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Yeah it’s like a gelatinous gooey substance that is easily removed but just floats around. My guppy isn’t eating it so it’s not algae it’s probably as Simon said fungal.

Hey folks, I've been thinking about feeding some live foods to my tanks, such as daphnia, cyclops, or some type of worm. But I live next to a river - so couldn't I just harvest some from there instead of culturing my own? Now I'm not sure if it's legal or ethical, or whether it's even remotely easy to do. I've seen fish and shrimp thriving in the river, so they must be eating some sort of good live food, and I want in on that ?. How would someone go about doing that? And is there a danger in introducing live food that has not been grown in a monitored environment? Lastly, could I potentially do the same with algae? Cheers, Crabby

I feed my betta with daphnia that originates from a lake we have at the house (so private property, non flowing). So that I don't have to keep going to the lake I keep some in a small container - I don't need many for 1 fish anyway and it is fairly easy to keep, though I can't keep it alive indoors in the summer, but then it is plentiful in the lake(s) anyway here? I doubt daphnia or similar do well with moving water (like a river) though! It would be worth trying with a fine net to see if there are any there though! Don't use tap water though, use water from an existing tank or collect rain water, river water etc. You may be lucky enough in Australia that you can culture in a bucket outside all year round though your problem is more likely too be heat than cold, daphnia don't like it too warm! Algae should be easy enough to produce in a bucket in a shaded area I would think and you could keep the daphnia in the same bucket, probably all year if it doesn't get too cold enough to where water may freeze? I feed my daphnia a mix of spirulina (algae) and yeast! Here is an old general video on daphnia, https://www.youtube.com/watch?v=xbfc30nw1PQ and a video on keeping daphnia, https://www.youtube.com/watch?v=y4h6kx5GlSk I don't know whether it is legal in Australia if taking from a river/pond on public land but if you aren't too greedy and taking some for setting up your own breeding culture I doubt there could be many people that would mind that? But you need to find out first if there is any in there anyway? You will need a very fine net though! Simon

It is rubber. But we are able to rub off the white substance, so it seems to be growing or accumulating on the rubber. I do think it’s fungal though.