
Herman. how many of these would you put in a 30 cube. will 2 #1's be too much flow. also do they come with the magnetI just bought the #2 & #3. The flow on these things is definitely unique. It spirals. Moves the water quite well and very softly. Excellent for smaller tanks or dead spots in larger tanks.
do you have sand in the cube, just thinking too much flo on a none controlable pump could be a problemI bought the #2 & #3 for a similar sized cube.
#1 might be too weak but then again I am thinking SPS
