DIY air stone - mist sized bubbles!
OKAY i got this idea from 'somewhere' i would love to give credit but i can't remember where i saw it.
i am using a DIY yeast (note to others adding a packet of yeast because you don't think it's working is a BAD idea, it makes a TON of CO2 and alcohol and the shrimp like it WAY more then they should - right up till they die)
i have a 'cheap' airstone and the bubbles were bigger then i liked even in the spraybar return (which is a great DIY on the fly venturi type system - looks like crud but okay sort term).
read you can use a disposable chop stick, okay I have a ton of those (i like sushi) ... well it's not bad the LITTLE air bubbles come out the end of the chop stick (you need it to lay horizontal in your tank, vertical makes big bubbles).. then i thought...
use the END of the chopstick (the angled part where they break apart more "holes" that way ... WOW GREAT...such tinny bubbles
Cut the chopstick by scoring it with scissors and breaking it. You only need 1/2 inch or less.
You can hook this to your DIY CO2 or Air (with a regulator thingy) and it BARELY on... and you get a super fine mist of bubbles.
(ps. yes, i remade my yeast - and stuck to 1/4 tsp - did make extra but then got busy and forgot to add it in - today the mix IS making bubbles like 2 every 5-10 seconds (so about right for a 6 gallon tank, heavily planted) .. i do have a fine mist of air going too.. trying to save those shrimp)