Prevents surface film. Prevents undesirable bio processes on the water surface and increases oxygen exchange! Has moveable intake float. Auto valve control mechanism. Surface outlet block circuit. Suitable for suction filters (any siphon filter) up to 1500l. goes into the water about 9" and attaches to a 1/2" hose. Removes surface sludge and attaches to the intake side of the canister!
Some say you get what you pay for. Others believe that you're just paying for the name. I believe, its a little of both. When you hold and tinker with the EHEIM skimmer and an $18 Aquaclear skimmer, you can feel the difference in quality. As for design flaws; well I have a EHEIM 2213 and I read that this device was acutally designed for the 2213 so it worked like a charm. I understand that other filters with more GPH output experience some problems if hooked up directly. The instructions tell you to use the skimmer as a secondary intake by creating a bypass to a separate line. Just make sure to disable the skimmer when feeding. So far, I'm quite happy with this product's performance. It skims the surface clean. It was easy to set up. There's even a little piece in the tube designed as a "turbo" to cause a funnel action and dozens of bubbles are produced, which I'm sure helps with oxygenating the water somehow. This product is very simple, and therefore there's less to go wrong. Pretty straightforward to opperate it. I just don't like the price so much. Otherwise good.
The design is "over engineered" and very tricky. I had this for a few days when I had Eheim canisters until i gave up. i couldn't get it to float correctly and the little weight in there would rattle. I now use Fluvals and have the Fluval skimmer attached to a 405 and works flawlessly. I never thought i could have a clear surface without positioning my outtakes near the surface so close that made lots of noise. I am very happy.
I use an Eheim Surface Extractor on both of my cichlid tanks and don't know what I would do without them. They keep my water surface clear of that unsightly build-up and help raise O2 levels in the tanks. Although it takes some patience and several minutes of tweeking to get the installation just right, it is well worth the effectiveness of this surface extractor. I've had no need to add additional parts to get the extractor to work properly and the only problem I have with either of my extractors is preventing rattling when the extractor isn't at the correct water depth. I can completely clear my 180 gallon tank of all surface build-up in under 30 minutes, 5 minutes on my 50 gallon tank. All in all, this product is worth the extra effort.
The problem is this: how do you make a cannister filter intake skim the surface? Up until recently, this was the only solution...and although it may require you to buy some adapters to fit your filter in particular, it does a good job. But here's the catch...the float sits just a little below the water, so the surface doesnt get skimmed. THATS CUZ IT WAS DESIGNED FOR SALTWATER! So if you are running it on freshwater you need to increase the float's bouyancy by adding a small piece of foam to it...and it will be perfect. And dont forget to turn it off when feeding. For details on the easiest way to do the bouyancy mod (cant post pics here) just PM me or email me...It is a little bit more than the new competition, but still a champ.
Eheim makes the best filters, but the surface extractor does not rise to the standards. While the parts are clearly quality products, the mechanism fouls easily causing the intakes to drop below the surface. I replaced a Fluval extractor with this when I replaced a Fluval filter with an Eheim. The different hose sizes required a different extractor. Well, now I've rigged hoses so the Fluval extractor could be used. It works much better and at about a quarter the cost.
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