protein skimming frshwater???
 

i know this may seem like a dumb question but i was wondering if it is possible to run a skimmer on freshwater to remove some of the nutrients.

As far as i have read, what makes skimming work are the properties of salt water (specific gravity, surface tension etc.) . If you have one laying around it would be neat to find out for sure though!

I think I read somewhere that a skimmer won't work on fresh,as it won't produce the tiny bubbles. I'd say just do a water change. Thats all I ever did when I bred Discus......waterchanges everyday it was crazy but I had some big ass Discus!!

that is what ive been told before as well. i just wanted to find out some opinions from others. thanks guys

Short answer: You can and you can't .. :lol:

Slightly longer answer: Generally speaking, you can't, you just won't get adequate foam fractionation (for the reasons stated above). However that said, there does seem to be such thing as a FW skimmer, think they are run on ponds in areas where the water is so insanely hard that basically you can get foam production.

thanks tony that makes sence as well.

yes you can. Just need a right skimmer.
PMed you

just ran a skimmer in freshwater and vinigar and it wouldnt skim, wont work without salt unless you look up a pond skimmer it works a little diff

You can get foam fractionation in fresh water - ever been to a waterfall or even a turbulent river and seen all that foamy crap? Yep, skimmate my friends.

that makes sence because you always see foam all over the shore at the lake when there is a wind of any sort which is usually all the time

thats pretty dirty water, i hope your tank isn't that infested with algae and junk :p

no no no this is all for a possible tank in the next few months. with like 300 small schooling freshwater fish lil project im thinkin about

are you thinking about a surface skimmer?

Steve

ya but that is the result of polution or an algae bloom in the water, in a normal stream/river, ect you get bubbles but they disapate imeadiatly, so no benifit. in normal fresh water there is no way to get foam with out adding something.

now I did read where you could buy an aditive to your tank water which increases the surface tension which makes skimming possible, but I can't remember what it was called or if there was any effects from long term usage.

Steve

No - I was thinking about an actual protein skimmer. I saw a company making them a few years ago. They used ceramic based airstones for the smaller bubble sizes and basically compressors instead of airpumps. Other than that they looked more or less identical to say the old style countercurrent skimmers. I went looking for the link but couldn't find them so maybe they weren't viable. Did find a couple skimmers that worked on a slightly (but not altogether) different principle on a couple Koi sites.

Thought I read somewhere that Tanganika water is hard enough that protein skimmers would work on it. I don't remember where I read that though so who knows.

The short answer remains the same. You're not really going to get a protein skimmer intended for saltwater to work on a freshwater tank. I can't really think of an application where it would be really beneficial anyhow, it's not like FW isn't easily managed with water changes.

just through in some melifix it will make the skimmer skimm and it is good for your fish. many very large lakes have a salt content to them Profict example is lakes manitoba and lake winnipeg. Both lakes are in lake lakes but are concidered inlane seas you can smell the salt on the right day. The sand flies are bad but they are attracted to the salt that is on you after you go into the water. You can find quite a few clams that are found in sea water they have adapted to the very low salinity of these lakes. I my self have never measured the salinity of the lakes. Is there anyone that will check it out in the summer???

Schuuran use to make a FW protein skimmer.

Totally disagree here young fella, all the time when I clean my skimmer's i use fresh water and vineger to clean, it will make super tiny bubbles and clean your skimmer unbelieveably clean. addd some more vineger and watch the skimmer go crazy.

i was waiting for mike to read this and reply. so what is your opinion on this mike?

FW can be skimmed, but for the equipment needed, you're better off doing water changes.

Can't go into it now, gotta go to work, but google this

foam fractionation in fresh water

I aprreaciate you saying that you are waiting on me to reply.:redface: Actually Im just a guy you have owned alot of skimmers. But you u think about it when you have a high Alkaline water the water becomes sticky lets say and with the nutrients in the water its going to stick to the Molecules in the water and with the air that is lighter then the water, casuing the nutrients to float to the top. Fresh was wont have the same effct on the skimmer. With Fresh water the nutrients are usually on the top so surfaces skimming is the answer.

does that make sense.

none :)

yes mike it does make sense, alot of what everyone is saying makes sense. but when you have it running through an overflow you get all that surface crap out right?

No, it doesn't make sense. The dissolved organics are not solely at the surface of the water, they're in solution just as with saltwater. Alkaline water is not sticky, the molecular charge of the water and nutrients at the air/water interface (hydrophilic/hydrophobic properties) determines what "sticks" and what doesn't. Fortunately for us in SW, the contents of the SW act as a better surfactant than is (generally) available in FW. Essentially SW is "thicker", if that makes any sense. :)

Where there you go the science right answer and that is why Brad is a Mod and I'm not.:wink:

Mike, I'm a mod because I paid off the rest of the team before you tried :)

There you go see Money can do wonder's and even buy Cocky attitude's too:hail:


lol

I was born with mine, didn't cost a thing lol

thats the understatment of the year... Can we have that put under your name :mrgreen:

Yup. That was exactly what I was thinking about when I first read this thread:

http://www.koicarp.net/filtration/pr...an_sander.html

Performance is defendant on:

Salinity

you still have to add salt to your tank but not as much, i have some in my freshwater as it keeps stress down

from reading andrew's link the water has to be brackish or salt water. so unless you are adding somthing to the water to increase the surface tension I can't see a skimmer working.

Steve

All a pond skimmer does is clean up the surface of leaves and other debris before they sink to the bottom and decay. No foam or skimmate are produced.

Umm did you click on this link posted above: http://www.koicarp.net/filtration/pr...an_sander.html ?

You may want to go back and do that.

^^^ What he said (thanks Canadian)

That's not your "typical" pond skimmer and not the one I was talking about.

x2!

Fair enough :) But FWIW it IS the one *I* was talking about. ;)

I disagree with you there young fellow.. the bubbles you get with vinager are totaly different than salt water.. the bubbles from vinager are short lived and low surface tension, and what they are doing is imploding along the sides of your skimmer because they cannot maintain the bubble. this implosion is the same as cavatation and causes little tiny pits in the size of the skimmer scale, hence cleaning it. but this cleaning action is two fold.. first you have the implosions knocking the scale off the sides, then you have the acidic power of the mixture desolving it. it goes crazy when ou add more vinager as it start fizzing (just like when you have a viniger water mix they you cleaned a lot of pumps with so it is saturated with Ca and you add more viniger to that.. fizzes right up.

Steve

I'm confused? What's the purpose of this skimmer? I get using one for a large pond but as far as aquariums go isn't water cheap enough to easily do large water changes to reduce nutrients? The cost of the skimmer and the power it uses will never pay for itself or be as efficient as simply changing water.

There's a reason these are used in SW and not FW.