I have a Remora running on my 37 Hex tank for maybe 6 - 9 months now. Up until recently, the collection cup would fill with about 2" of green tea every week. I know, not that much, but it's only a 37g tank with 5 small fish in it
Lately, I have noticed that it is not skimming AT ALL. I "stole" these pics from way back in this thread, but this is pretty much how mine looks like now, as far as the foam column height and all:
I also noticed that the muffled "hiss" that used to be coming from under the collection cup is not quite as loud as it used to be. I was running it with an MJ 1200; I tried switching out to another MJ1200 (thinking maybe the original was not working 100% anymore) but a new pump has not made any difference. And the amount of water at the output still looks good.
I am thinking maybe the air injection part is either clogged with salt creep, or needs to be adjusted?
I bought this skimmer used, so I don't have any instruction manual or anything.
Do you adjust the air quantity by turning that screw in the input pipe? Does opening it (turning screw counterclockwise) mean more air or less air into the mix?
I tried to turn it with a screwdriver but it felt like it was stuck, and I didn't want to try forcing it and possibly break it. Could it be stuck due to salt buildup?
Like I said it used to "work" well enough for me; I just want to get it back to how it used to perform.