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Old 05-19-2005, 09:29 AM   #1
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bak pak 2 not skimming

I have my bak pak 2 hanging on my 20gal sump. It was skimming. Then it stopped making so many bubble. I turned the air flow off for a bit so it was only pumping water then turned it back on. Now it it pumping bubbles like mad, but there is not waste being skimmed.
??????????
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-50gal tank
-20gal tall sump / refugium.
-About 15-20 lbs of live rock
-60 lbs (3") of sand.
-2x65w power compact lights
-2x18w power compact in the refug.
-bak pak 2R
-3 LARGE feather dusters all differebt colors
-orange spotted goby
-fire fish
-12 or so hermits
-50-60 nassairus snails
-about 12 turno snails
-emrald crab
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Old 05-19-2005, 11:14 AM   #2
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how new is the tank?

if you really only have 1 spotted goby and 1 fire fish in a 50gallon, you likely have next to nothing to skim.

but for the record, the CPR does a better job if you upgrade the Rio 600 to a Maxi-Jet 1200.
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Old 05-19-2005, 12:41 PM   #3
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Test your Alk levels and post the results.
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Old 05-19-2005, 02:19 PM   #4
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My current stock of the tank is 1 tomato clown, 1 fire fish, 1 oragnge spotted goby, and 2 scooter blennies (dragonets).

I am already using a maxijet 1200 with it.

Is there a common term for ALK?
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-50gal tank
-20gal tall sump / refugium.
-About 15-20 lbs of live rock
-60 lbs (3") of sand.
-2x65w power compact lights
-2x18w power compact in the refug.
-bak pak 2R
-3 LARGE feather dusters all differebt colors
-orange spotted goby
-fire fish
-12 or so hermits
-50-60 nassairus snails
-about 12 turno snails
-emrald crab
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Old 05-19-2005, 02:44 PM   #5
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Alkalinity (dKH, alk, KH...)

The tests that report (Low/Med/High) aren't very good. Try to use one that has actual numbers. Maybe your LFS can test the alk for you.
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Old 05-19-2005, 03:13 PM   #6
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as long as the skimmer is creating a layer of bubbles that you can see. you should be good to go. The bottom of the collection cup just just be touching the surface of the water.
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Old 05-19-2005, 04:29 PM   #7
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Phyl,
why does Alkalinity have anything to do with skimming?

Lower the collection cup a little. if you start getting really watery skimmate, then your tank just doesn't have much to skim. try increasing air by just a tiny little twist, and see if that helps...but again your tank might just be very low on DOC's to skim out.
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Old 05-20-2005, 02:19 AM   #8
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My Bak Pak goes through interesting periods of ill-will toward working as well ; ) I usually take the collection cup clean (With hot water) and place it back in. I adjust the height and air flow to 'force' some water into the collection tube and then ease back a little. After about an hour, I adjust from there. They are *very* picky skimmers. As for the color of the skimmate I have read all kinds of things. If you skimmate is light or clear, then you are most likely over skimming. Simply back off the bubbles a bit (by either adjusting air flow or adjusting the cup up) and it should darken a bit. You probably want 'tea' colored water unless you are aggressively skimming for a reason. There is also a mod for the bak pak using an air stone if you are interested.

http://www.cprusa.com/forums/viewfor...7b79be85c82672
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Old 05-20-2005, 12:44 PM   #9
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Actually my skimmer wasnt hard to setup at all, they have like a seasoning time. After a certain period they start to work awesome and you will have no problems adjusting. Ive since stepped up to the prizm pro deluxe skimmer, that thing is nuts.
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Old 05-20-2005, 02:29 PM   #10
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Malkore, the thing with the alk is my own personal experiment. My skimmer stopped producing all together. It went from working alright to just not working at all. I tried everything from cleaning it to running it without the valve on the venturi hose at all to taking apart the darn PH. Nothing helped. As I was preparing to order my G3 I ran some tests on my water (totally by coincidence) that I hadn't run in a couple of weeks and I noticed that my alk was down around 7'ish. As a result of that I started adding alk back to my system. Miraculously, as though related, as soon as my alk got back into proper ranges my skimmer started producing skimmate. I'm not sure how they're related, but I'm all but sure that they are. I posted up on the Reef chemistry forum over on RC and Randy all but told me it was either a total coincidence or that the increase alk resulted in an increased waste by the tank. Totally not possible. I know there was stuff that should have been skimmed out of the tank in any event. So any time I find someone who's skimmer stops skimming the first thing I'd like to find out is what their alk numbers are. I haven't found anyone to corroborate my story yet, but I'm hoping

So there you have it. A nut in a shell.
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