Well, ammonia is down to the 2-3 mark after being clearly 8+ after an oops. I added a total of 8oz of API Quick Start, and that seems to work. They do make all kinds of bacteria that they can make go dormant for storage, but not sure if it's the case here. I had some good stuff for my camper that worked well.
I've tried all three disc diffusers, the fine, medium and coarse, and the coarse produce much more movement.
Those cheap linear pumps I got actually work quite nice as far as pumping air, but they are obnoxiously loud. With the coarse diffusers, it was the worst. Seem to need more back pressure on the output, or restrict the input to get them a bit quieter. I put the fine diffusers back in AND restricted the input, and that it more of a tolerable hum, I'm gonna have to get something different.
The big problem with the noise is it pulses too rough, and that goes thru your plumbing. If I hold the PVC assembly down on the bottom of the aquarium tank, it just rattles and bounces like crazy even tho there is a flexible hose between the compressor and PVC assembly. The compressor itself is sitting on a piece of sponge foam that's about 2" or so thick, so it's all going thru the air line. The air hose is 10' long and loosely coiled up, and if that hose touches the table, it rattles and bounces.
This is actually one of the strangest things I've seen in a while. I've built vibratory bowl feeders that were quieter than this!
