Countercurrent exchange means longer dwell time. You also get longer dwell time with tall skimmers. To reduce turbulence, you can lower the air intake, slow the countercurrent, or a number of other things.<a href=showthread.php?s=&postid=10641233#post10641233 target=_blank>Originally posted</a> by manderx
do you understand the concept of countercurrent exchange?
<a href=showthread.php?s=&postid=10632790#post10632790 target=_blank>Originally posted</a> by pjf
• Particulate organic matter (POM),
• Dissolved organic compounds (DOC), and
• Yellowing compounds (Gelbstoff).
What skimmer can skim the above without additional media or algal filtration?
It would be nice if we can keep the price of the new skimmer to no more than the combined price ($452)
<a href=showthread.php?s=&postid=10642163#post10642163 target=_blank>Originally posted</a> by hahnmeister
According to Escobal, it takes upward of 2 minutes for some proteins to attach properly to a bubble after initial attraction.
<a href=showthread.php?s=&postid=10637938#post10637938 target=_blank>Originally posted</a> by kodyboy
schuran makes skimmers that can skim freshwater so maybe you should look into those
no. the real magic in countercurrent exchange is not about dwell time, but about maximizing the gradient (and therefore in theory total transfer) between the water/bubbles for as much of the dwell time as possible. i strongly suggest you read up on it. i would not consider any of the recirculating skimmers that i know of as countercurrent, even though they do feed input water near the top and exit the bottom, just too much mixing and turbulence within.Countercurrent exchange means longer dwell time.
<a href=showthread.php?s=&postid=10644007#post10644007 target=_blank>Originally posted</a> by jimdogg187
I think you guys are looking way too far into this.
There is no solid/empirical data that can effectively measure a skimmer's performance. Too many variables from tank to tank as well. Some skimmers are more effective than others due to design, air intake, etc., but too many variables to test this accurately. And even if there was a rock solid way, skimmer manufactures probably wouldn't even want to acknowlege it. Too much money at stake.
I would like a car that doubles as a boat. But even though they have been developing boats for centuries, and cars for a century, there still is no practical/popular way to do this. So the best option is to buy one of each, even though the boat will just sit during the winter months.
So what I am saying in this analogy, is that running different types of filtration is the best way keep your tanks water crystal clear for now. There is no super-special skimmer that will take care of all of your filtration needs. Sorry, it just doesn't exist. Not for $100, not for $5000.
I run a skimmer, a refugium and carbon. Keeps my water crystal clear.
Just my opinion on this matter.
Jim
<a href=showthread.php?s=&postid=10644007#post10644007 target=_blank>Originally posted</a> by jimdogg187
I would like a car that doubles as a boat. But even though they have been developing boats for centuries, and cars for a century, there still is no practical/popular way to do this. So the best option is to buy one of each, even though the boat will just sit during the winter months.
Jim
All of the skimmers would be sucking in the exact same mixture of water. That is the whole premise behind using the natural sea waterUnfortunately I don't think using real ocean water would be a good idea. It is way to variable from day to day. I live on the beach here in SoCal and the amount of stuff you would skim out would change on a daily basis. We get tons of bacterial warnings and contamination warnings. Some days the water gets so bad that large balls of foam form on the water line and the next day it will fine again. I would just use fixed known artificial sea salt to make up the "industrial standard".