Robb in Austin
New member
Holy giant photo!
Functionally I don't see a difference between using a piston or diaphram air pump for painting face masks and a scuba tank. I would use a 2nd stage scuba regulator/mouthpiece so if something screwy happens you don't end up trying to inflate your lungs with the airpump (although you probabaly would make the national news and get a Darwin nomination :-D ). The regulator also stops the airflow so you don't constantly have bubbles in your face. It's also surprising how much bubbles disturb things sometimes when you're working up close to the rock so being able to hold your breath to stop them is helpful. With the ulterior motive of seeing your 1700 I've volunteered to help move your old 750 so I'll bring my setup along for you to look at.
The hooka is the way to go but a quality compressor can be expensive. We usually use a standard scuba setup but with a 50' hose between the tank and regulator, effectively a hooka system but on a tank. At 3' of water the tank should last you 2 hours or so, talk to any dive shop and they should be able to set you up for around $1k for a top of the line set up, less for what you need. Talk to a dive shop and don't diy it, something like 2psi can cause deadly damage to your body.
You can see the defined dark spot in the middle up top. These lights I believe the spacing between the 4 rows is 24", 48", 24" and you can see between the 24" rows there is no dark area, a little bit on the right side if you know what your looking for. That window is about 5'x7' and the lights mounted about 1' above the top of the field of view. With 3' of height to blend I think 36-40" between same colored lights should give enough overlap to eliminate the spotlight effect. In person it's harder to see the dark area and really only a reef keeper sees it but its one of those things you'll see with a shallower tank. Of course this picture is way more blue than in person as well, the iPhone enhanced some things.
I'm not sure what browser you're using, but in Firefox you can right-click on the picture and select View Image.pmrogers said:Your picture isn't coming through for me.
I'm not sure what browser you're using, but in Firefox you can right-click on the picture and select View Image.
Dave.M
You are correct, h.cordero, in that the straight Calfo-type overflow pulls the oily layer off the surface of the water better, but that is not the only thing you want to pull from the water. You also want to pull out all the floating particulate matter that your filter socks will then take care of. This floating stuff is actually blocked by the Calfo-type overflow and ends up accumulating in your tank as detritus.
It's a question of balance. The toothed-type overflow still pulls a goodly amount of the oily layer out of the water plus it pulls out the floating particulate matter which the Calfo-type leaves behind. And lest you obsess too much on your protein skimmer processing all that oily layer you should understand that the skimmer only manages to remove 30-40% of that stuff from the water at even the best of times. There was an article (in either Reef Keeping or Advanced Aquarist, can't remember which) that reported these test results.
You are welcome, of course, to follow whichever path suits your tastes and experience. That is why this topic remains a bit controversial.
Dave.M
Air injection will help remove oils from all levels of DT then it doesn't matter which overflow is used![]()
http://www.youtube.com/watch?v=mBlq1mzcsS8&feature=youtu.be
http://www.youtube.com/watch?v=ZvdXWPRKIIw&feature=youtu.be
I am guessing that you are not experiencing the irritation to your corals and fish that others have reported from microbubbles with your air injection system?
Dave.M