thanks for the kind words, this tank has been set up for 9 years(started as a 55 then a 100 then finally a 125. as far as the scwds go i have not had a single drip out of them, i love them both, one is on the main pump and 1 is on the return from the uv/chiller, you can expect about a 15% drop in flow, i am running a quiet one 5000 as the main pump and that scwd changes about every 4 to 5 seconds, the uv/chiller one changes every 10 to 15 seconds that pump is a ca 2200. i don't know if anyone knows it yet but the up graded is slated to come out in aug/sept, it's a larger model with threaded inputs and outputs(per e-mail with scwd maker) there are 2 different models that are being tested right now, 1 has the ability to let you set the switching speeds instead of just by water flow. they are both gonna be 1 inch inputs and outputs for larger pumps(the current scwd handles up to 1400 gph) here is a pic of my scwd set up. the purple beauty on the left is a crocea clam. once again thanks for the kind words. this is a nice website, i also go to 3reef.com, its also very nice, i am not a big fan of the other forum as i use a gasp!!!!!!!!! wet dri filter and it is akin to having leprosy over there. i have pics of the inner workings of the tank, just let me know if you would like to see them. that little scopas was giving to me because he was such a little a$$ in the tank he was in. he was about the size of a 1/2 dollar when i got him,and he got his butt handed to him and had all of his fins chewed off. he grew them all back became a model citizen and a year later he has tripled in size and is my wifes fav fish.