Skimmer has Gone Nuts!!

sweatervest13

Active Member
I have a Reef Octopus skimmer for my 125g reef tank in the sump. I did a big WC two weeks ago and cleaned the sump a bit (and cleaned the skimmer). It was running fine but the production was a bit low for what it usually does. I tweaked it by turning the gate valve just a fraction more open. I did this for the last two weeks. Maybe a total of 3 or 4 minor tweaks. I would say that in total I turned the gate valve 1/8 of a turn more open. Each time I tweaked I would observe it and see if the skimmate was increasing. It would by just a little.
Well, yesterday I came home and had a bunch of stuff going on. My wife and oldest daughter are out of town and I stayed with my 20 month old. Got her feed and to bed, then watched some TV. Had to feed the fish, so I went down to the basement, the first thing I do is check out the sump in the fish room. HOLY COW!!!! The skimmer had gone crazy!! There was foam about 2" thick in the entire sump. I have a pretty big sump (48" X 18" X 18") and foam was almost coming out of the thing right next to the skimmer. The cup was about a 1/4 full the day before and it emptied the skimmate in the sump and just started skimming harder with the extra gunk.
I was lucky that I had started mixing water for a WC two days before. It was 11 at night and I was about ready for bed. But when the tank calls you gotta answer.
SO, I cleaned the skimmer and shut off the return pump to isolate the sump. Cleaned the sump again. I used a quart sports drink bottle that I had been using to store top off water for my QT tank and drained about 12g out of the sump. The bottle worked very well to surface skim, I just dipped it down and let all the foam drain into the bottle and dumped it into the tote I use for WC's. Have you ever done a WC and took water out 1 qt at a time?? It is no fun. But I figured that it needed to be done.
Once I was done I put the skimmer back on line and left it at the same setting. The thing went nuts again. I had to tweak it for the next hour to make sure it did not do it again. I ended up turning the gate valve 3/4 of a turn back.
The only thing I can think of is that something blocked the intake for the pump on the skimmer and came off. Any other ideas on why it want crazy??
Moral of the story for me... Check the tank as soon as you get home.
 

flower

Well-Known Member
Hi,
Skimmers once set are set. They don't skim the same amount of gunk all the time...as the yuck increases in the tank, so does the skimmer gunk. Instead of letting the skimmer do it's work on the sweet spot setting, you raised the foam each time with a turn of the knob when you tweaked it, after a good cleaning it would be normal to have less skimmate....then when things in the tank went back to normal, it over skimmed.
Now you lost the sweet spot and you have to find it again. Having a fish room is awesome but it also means you are not right there to notice a problem, so the idea to routinely check on everything when you get home is a great idea.
 

reefkprz

Active Member
my aqua clear has done that before when the sump water level changed too much for it, and again when I accidently bumped the knob when dickering around in my sump. darn narrow clearances.
the other thing that could be is soap or some similar hydrophobic substance found its way into your tank. you ever seen what a skimmer does to soapy water.... I have when cleaning one a long time ago (yes I used dish soap for some stupid reason it took for ever and a day to rinse it soak rinse soak etc) its quite the enthusiastic response from your skimmer kind of like dish soap in a dishwasher FOAM EVERYWHERE!!!!!
 
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