o.k. you guys skimmers 101!!!
please note, these are only my opinions, and that is all they are
first off....
"berlin" is not a
type of skimmer, it's a totally worthless name brand of skimmer made by red sea. it saddens me that they are still sold and saddens me even more that people still use and (think that they)like them.
"berlin" is a reference to a german method of reef keeping wich combines protein skimming, mechanical filtration(polyester pads or socks), bare bottom tanks, carbon use and high powered lights.
so you have;
1. air stone skimmers
2. venturi injection skimmers
3. aspirating needle wheel skimmers
4. downdraft skimmers
5. beckett skimmers
6. threadwheel skimmers
1. air stone skimmers, the first ones on the block, i think were made in the 70's by sanders, a german company. worked well but the constant clogging of wooden airstones made them annoying to service and made skimmate production unstable. the newer versions of home made models incorporating ceramic air stones and high pressure air pumps work much better than thier 70's counterparts.
2. venturi skimmers, i think the first was designed by tunze in the 70's if im not mistaken, and then of coarse the red sea berlin skimmer from the 80's. there are a whole host of skimmer companies who came on the market then, making venturi skimmers of all shapes styles and sizes. readily available and they work fairly well, usually this is a persons first skimmer for thier tank.
3. i cant remember the name of the grandmother of all needle wheel skimmers, kraus something...lol but for all practical purposes i think deltec was the first to mass market thier needle wheel skimmers. had their turbo skimmers in the early 80's, like '84. i think it was just a few years later that aquamedic came out with thier needle wheel skimmers. not sure when h&s and euroreef joined the game but i dont think it was until the 90's.
the needle wheel skimmers definately lift the skimming standard to new heights.
4. downdraft skimmers are basically a reference to ETSS skimmers, they were the first to use this style of air/water injection. they are fairly efficent at the expense of high pressure pumps to drive their injectors, sufficient backpessure is needed on the injectors to draw in large amounts of air and then spray thenm down a tube of bioballs to break up the air into smaller bubbles. these skimmers were the mainstay of professional /commercially used skimmers for years, now their day is finally waning.
5. beckett skimmers were the answer to a more powerful downdraft skimmer, requiring even more power from high pressure pumps to keep up with their high performance. i think their downfall is the high cost of running them coupled with the lack of dwell time for water inside the skimmer, creating the need to increase the many passes per hour it requires to skim efficently.
not very green....
6. it is my opinion that the new threadwheel skimmers from ATI are going to revolutionize protien skimmer design, i have never seen performance like i have with these skimmers, and everyone and their dog and mother is running out there to mod their needle wheel skimmers to threadwheel. they increase air injection, lower wattage needed, and produce smaller bubbles than other current skimmer designs. the threadwheel modification can be done to just about any needle wheel/venturi protein skimmer with a little d.i.y. smarts.
mkay, enough for now
please people if you know some little tidbit of skimmer history and have noticed any mistakes on my part, please post, i want to get my skimmer history correct!