Pump Placement

[RBU1]

Hi Roger,

How would you place 2 - 6100 pumps with a 7095 controller on a 93 gallon cube? The dimensions are 30x30x24tall. The overflow on a standard tank is in the corner. I am getting a custom cost on moving the overflow to the center of the back wall. Your answer for pump placement might also effect the decision to move the overflow. Thanks for the suggestions.

[rvitko]

I would basically have an X patterned flow with one pump in each back corner aimed diagonally across the tank and alternate which pump is on.

[RBU1]

OK so getting the overflow moved to the middle of the back wall would probably work better. Instead of having it in the corner....

[RBU1]

Roger,

I have the 2 pumps as you suggested but I am having a hard time understanding how to set them up with the 7095 controller. I have to turn them all the way down or that special grade sand blows all over. It seems that no matter what setting I put the dials on both pumps stay on and the flow does not alternate. I am going to try and re-read some of the manual tonight but I am struggling.....How should I set these dials? I have both pumps plugged in next to each other on the controller. Does one need to go on channel one and the other on channel 2? How should I set the dials?

Thank You

[rvitko]

Place one pump on channel 1 and one on channel 2. The pumps on each channel pulse back and forth between top and bottom knob settings you need to turn both settings down. Do you have the older 6100 or a newer 6101 or 6105?

[RBU1]

Its the older 6100. I have them on channel one and channel 2 now just not sure how to set thos dials. one says pulse and one says interval. It seems no matter what I set those dials at both pumps are always on. Should I see a pump stop totaly or just reduced flow? How do you think I should set those dials? I have the min max dials down at min or sand blows all over.

[rvitko]

What mode are you using? Interval is the time between channels, it only works if both channels are used. Pulse is the time between speeds (top and bottom knobs on each channel). The 6100 had no simple way to reduce flow, the best bet would likely be to trade out the transformers for the smaller 6000 transformer 11V instead of 19V, this cut the max flow almost in half.

[RBU1]

I have it on interval right now. It is still moving sand around but not to bad. I will continue to mess around with it and hopefully can find a happy medium between the flow and the sand. Don't want to mess with changing out the transformer.

Thanks

[RBU1]

wait so the min max knobs do nothing to reduce the amount of flow coming out of the pump???

[rvitko]

They do change the flow, but now your range is 1000-3200 about and a smaller transformer changes that to 600-1800. My point was the newer pumps need a $2 chip to do this and the older ones need a $40 transformer.

[RBU1]

OK I got it. I will mak them work somehow. Thanks