came back from work , and after thinking about the amount of o2 in the ress, because the plants looked overwatered to me. checked on my garden and remembered that I had an extra diffuser so... I got it and put it in a bucket and FUCK!!! I was drowning them!!! the diffusers were like 90% clogged in comparison to the new one, and just after 26 days? , and it did it so gradually that I didn't even notice it, had to put another 1/4" air line in each bucket, for now . I'm not using these anymore, going to get me some big airstones first thing in the morning