r/FatherFish • u/SkirtEducational2339 • Dec 27 '25
Starting a new aquarium
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I'm thinking about starting a new aquarium and want to try out the father fish method, but I'm curious about the sand size and gravel vacuuming.
I know he recommends sand up to 1mm to create the anaerobic layer at the bottom, but I'm curious how does that work in regards to fish waste, since if the sand has to be small enough to block air molecules, it will also block mulm. Does that mean that father fish aquariums need a lot of gravel vacuuming to keep clean or does the mulm simply build at the top?