I can confirm that the Polyester Felt bags in a panda is the bees knees.
I bought 100, 50, 10, and 0.5 micron sizes and double stitched bags for each size.
I place all the micron sizes inside and use all of them at the same time. 100->50->10->0.5
It filters about a gallon per minute or more.
Ive liked it so much that im now experimenting with using powders inside the bags, so the solution is being cleaned at the same time its being filtered.
But 0.5 micron is no problem with the other sizes before it.
There are two sides to the felt, one side is smooth and the other is “hairy”. Use the smooth side towards the inside to make cleaning easier but if u dont plan on cleaning it, the “hairy” side catches more before clogging.
Ive ran about 30 gallons of alcohol extract through it and havent noticed any lagging from clogging
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