Hey guys, does anyone know where I can get a very small C02 diffusor? I bought the bubbler below from 88 in Sunway Damansara because it was only RM1 but the bubbles are way too big.

The others I saw were small but the tube to feed the C02 line was facing UP. I need it to be facing down.

Basically what I'm trying to do is fit a diffusor into a C02 reactor to increase the efficiency of the reactor. Any ideas on where I can find an appropriate one?

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Cheers,
Nathan