use perlite. i think the bubblers are kinda outdated tech at this point. especially for cakes where you just want as much humidity as possible, perlite will give you good results.

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this time, the revolution will NOT be televised.

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Hungry, Cold, and Hunted - BWP

Don't mess with the filterbox, get a decent filter (like the of FP has for jar lids), and cut it up to replace the little filter on the bubbler. Its more important for casings than cakes, as casings contam more often.

If your cakes are turning blue, I think PF's double-ended casing take can heal them.

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I think the monkeys at the zoo should have to wear sunglasses so they can't hypnotize you.

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"The spice expands life, the spice expands conciousness, the spice is vital to space travel.
The spaceing guild and it's navigators, use the orange spice gass which gives them the ability to fold space,
that is travel to any part of the universe, with out moveing"
Dune

Newer method: Use a HEPA vacuum cleaner bag, surround the whole pump with it. Seal end of bag where electrical cord and air tube go through with silicone. (MUCH EASIER)

Why use a bubbler? No perlite to clean up.