BrianB Posted October 20, 2010 Share Posted October 20, 2010 So I picked up a 20l to use as a sump and am trying to figure out what height I want to have my baffles. I am gonna use 3 on the input side where my return goes. I know I want about a 4 to 5 inch piece of glass and behind that will use eggcrate with screen material to keep things out of the return section. I have them cut at 10 inches now, the first baffle the water will go over then under then over again. Should I cut down the last baffle a inch or too for evap? Quote Link to comment Share on other sites More sharing options...
Rick Posted October 20, 2010 Share Posted October 20, 2010 If it were me I would use a single baffle in the input area. Then put the over under baffles at the other end next to the return section. The first section just needs a single baffle to give a consistent water level for a skimmer pump. The middle section will rise and fall with evaporation and topoffs. The baffles are to remove bubbles and will do so more effectively if they are just before the return since they will removing not only the bubbles from the drain but also any bubbles created with a skimmer. For the baffles at the end I would put 2 tall ones from the top down that leave 1 1/2" or so at the bottom for water to flow under them and then 2 that come up from the bottom that are about 3" tall. This way the water will still flow as long as it's over 3" deep. Quote Link to comment Share on other sites More sharing options...
BrianB Posted October 20, 2010 Author Share Posted October 20, 2010 Currently I am not using a skimmer, I made my stand to low to put one in the sump. This is just my frag tank anyway. I don't have a issue with bubbles from the return pump now. Wanted a longer length sump and shorter height. This is what I am running now. Quote Link to comment Share on other sites More sharing options...
TRENT Posted October 20, 2010 Share Posted October 20, 2010 Here is what mine looks like and seems to work well (video). Mine is also a 20L feeding a 40B. Hope this helps. http://s355.photobucket.com/albums/r479/TRENT_G_album/?action=view¤t=MOV02318.mp4 Quote Link to comment Share on other sites More sharing options...
batchelor Posted October 20, 2010 Share Posted October 20, 2010 How did you get the algae to spin like that? It looks like it is on a rotissary. Quote Link to comment Share on other sites More sharing options...
TRENT Posted October 20, 2010 Share Posted October 20, 2010 How did you get the algae to spin like that? It looks like it is on a rotissary. LOL, It's the force of the water going over the baffle causes it to spin. This way it gets light from all sides. Macro seems to love it. Quote Link to comment Share on other sites More sharing options...
BrianB Posted October 21, 2010 Author Share Posted October 21, 2010 You have your return line in the fuge area? Quote Link to comment Share on other sites More sharing options...
titus'reef Posted November 19, 2010 Share Posted November 19, 2010 i made my 20L same way but the Gray line from the return is all the way down which where the input and skimmer will be. i didn't test it yet but i hope it works. Quote Link to comment Share on other sites More sharing options...
ReeFit Posted November 19, 2010 Share Posted November 19, 2010 the 3rd baffle on your design only needs to be as high as the one at the return end because that is all the higher the water level will get. theres no sense in making a giant waterfall in your sump. Quote Link to comment Share on other sites More sharing options...
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