Stephen Hurlock's tank requires a dry box inside the tank, to me its a wasted space and can only directed one way
ching chai tank using 8 tunze 6305
http://www.youtube.com/watch?v=GvtrSw3XQAM
tunze pro
more gallon per hour 7925( 6305) 5,811 (6205)
can be wet
up hold into 1" thick glass
flow can be directed in any position
great customer support ( best in the business handsdown)
con's
needs controller (i have neptune apex so only 20 bucks more for the cable)
more bulky than mp40w but I learn to love it!
mp40 w wet side constantly fall down according to some people on 3/4" thick glass
and not as good of a customer service as roger( tunzeusa)
but it comes with a controller and generate less heat because the motor is outside of the water.
its a matter of preference
as far a dimmable ballast its great !
not only you can adjust the watts+/- (10- 30%) you can also adjust the color temp on 20 k bulbs more watts the whiter
less watts more blue.