some of the lakes in canoe country harbor water fleas..Daphnia. harmless,but who wants "swimmers" as they
are also called in their drinking water--soooo--yes..i
have used a coffee filter to strain them out..very slow
process but it works..maybe a cheap filter would work
faster than the Melttia's which seem to have a fine weave.
i have also used "jam bags" or whatever they are called
in your part of the world..they are found among the wax
and canning jars section--they fit in a metal strainer gizmo
for making jelly--draw string top--very handy and cheap..i
use one to carry a fishing reel around in my pack..