The Rio50 in my Picotope is utterly silent, and I even have it on the timer with the lights so it probably gets a little more wear than whats typical. Is the thing actually moving water? Might still be full of air. I have an old Penguin PH (its a spare now) that rattles badly when I plug it in, I have to baby it a bit to prime it/flush air out and the noise stops once it starts moving water. The box yours came in looks totally different from the box mine was in...
The AC70 used to hum pretty loudly, but its broken in now and the hum is much less and only noticeable as I'm dozing off to sleep (tank is on my nightstand).
I'll chime in on your cycle, I didn't even bother testing cycle params when I started mine in October, I let it run for about a month with no livestock added, started seeing green on the walls and brown on the sand, put a couple ceriths, a pair of blue-legs, and a single nass snail in. They went right to work, and so far no casualties.
Nice refractometer, it came with that calibration solution shown on the packaging?
Thanks for the response!
Yeah, it's just a slight buzz...my other cheapo powerhead does the same thing, but i can at least eventually mess with it and get it to prime and it quiets down. It's definitely moving water, just not as quietly as I hoped. I might be SOL on this one...maybe RIO will replace it?
Having the hum I read the AC70 plus the noise the Rio 50 isn't ideal though. I'm a sucker for quiet setups...I set my computers up the same way.
We'll see how it goes, I should be able to drop in the AC70 tomorrow night after the silicone cures all the way.
The green is definitely all over my rocks and was beginning to layer up a bit on my walls. I cleaned it up a bit with a Nimble Super (also came in yesterday) and blasted the rocks with an eye dropper though. Needless to say my filter floss is picking up tons of crap!
Yeah, I'm pretty impressed with the refractometer. I've never used one before, but it's definitely has a good solid weight to it. It doesn't feel cheap. The calibration solution came in the box...although after testing it with the solution, it was already accurate from the factory. Good stuff.