Hi all. My first post, but I'm a long-time reader
Decided to reply to this thread as I wanted to continue the discussion, and there are already 5 other threads on the subject.
I've noticed a trend where in-tank diffusers are generally used in smaller tanks. Then switching to inline for bigger tanks. Is there any reason for this? Is there something that makes inline diffusers less suitable for smaller tanks?
The reason I ask is because I've recently set up a 54 litre tank with an inline diffuser and I'm a bit disappointed with the CO2 consumption. Even though I'm only targeting 15ppm CO2, I still need to have 3 bubbles per second to achieve it.
Might I get better efficiency by switching to an in-tank diffuser? I'm wondering if the inline is simply designed for a faster flow rate than my 600 l/hour filter provides.