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Old 10-27-2004, 02:32 PM   #1
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Brown crud in the water?

I have this brown crud floting on top of the water in one of my tanks. Even when I do water changes it's still there. It just floats there and when I stick something in the tank and pull it out it's completly covered with it. Any idea of what this is and how to get ride of it? Oh...and what's causing it? It's not that visable but I can tell it's something....especially on a test tube.
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Old 10-27-2004, 03:05 PM   #2
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Do you have a skimmer? Any other tank info would be helpful, size, livestock, water parameters, lighting, filtration...
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Old 10-27-2004, 03:12 PM   #3
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30gal, 50/50 lighting, 40pds LR, 10pds LS, have a skimmer, fluval 204 filter, live stock: 1 Red Leg Crab, 1 Cleaner Shrimp, 1 blood red shrimp. Water parameters are normal. No fish because my Flame Angel is in OT.
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Old 10-27-2004, 03:14 PM   #4
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The two things that come to mind are DOC in the water (which your skimmer should take care of) or an algea outbreak. The latter is ussually caused by excess nutrients in the water. Test Nitrates and Phosphates to make sure they are within normal limits. How often do you feed?
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Old 10-27-2004, 03:26 PM   #5
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Not very offten at all because it's only the inverts in there....maybe 3 times a week at the most. I have a skimmer...not sure the brand but it filters up to 100gal. I'll check the phosphates though I just used the phosphate spong this summer.
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Old 10-27-2004, 05:35 PM   #6
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A fluval 204 on a 30 gal tank is not much in the way of flow. Unless the return from your canister filter is aimed along the surface of the water your most likely seeing a build up of organics. The skimmer cannot remove it from the water as long as it's on the surface. It needs to be constantly broken up and mixed into the water column.

I would definately suggest some additional water flow, Maxi jet 900 perhaps. Be sure at least one pump is constantly rippling the water surface to break up the tension and allow the skimmer to remove the nutrient.

What you are describing as far as brown stuff sounds much like leftover flake food residue?

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Old 10-27-2004, 05:45 PM   #7
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I have a powerhead..just forgot to add it to the list...it's not aimed at the surface though. I think I may be able to aim the powerhead or the fluval spout to the surface
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Old 10-27-2004, 06:24 PM   #8
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Please do list the skimmer make/model. It sounds an aweful lot like a Prizm, or a SeaClone. If its a seaclone, you can modify it to make it more efficient. If it's a Prizm...you have my condolences. I think my prizm caused more problems than it did good...and thus it's in a skimmer graveyard with all the other prizms.
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Old 10-28-2004, 02:14 AM   #9
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I'm out of town but I will list it as soon as I get back.
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Old 10-29-2004, 10:51 AM   #10
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It's a Prizm
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