Hey all. I've seen another thread that's a few years old in regard to what the max-speed setting does when you set up Vortechs in a parent-child relationship, but it might be worth bringing up some findings. I haven't done extensive testing on this yet, but maybe we can figure this out with different modes.
I have a MP40 on each side of my four foot tank, running in anti-sync, with the left side acting as the parent and the right as child. Because I also have my return running in the same direction (right to left), I wanted to reduce the max flow on the right MP40 so that the left could counter the flow and create better flow on the right side of the tank. I've tried reducing the right (child) max speed in Mobius, but was frustrated because it didn't seem to make any difference when watching the flow speeds.
The logical thinking is that the child max-speed should be a percentage of the parent, but clearly not the case. When playing around with it, in both Expanding Pulse mode and Lagoon Mode, this is what I found:
Expanding Pulse
Lagoon
So, it seems to me that the max-speed slider does not act as a flow percentage of the parent (at least in anti-sync), but more as a limited flow range of the parent. In both cases, 25% in Expanding Pulse and 20% in Lagoon, you hit a max of that variation in flow and it eventually acts as if it's 100% of the parent's flow. Going above these numbers does not affect the child in comparison to the parent. While keeping the max on the child to 1%, almost keeps it at a steady flow rate, which defeats the purpose of certain modes in many cases.
I plan to test this more, but in the case this was useful and anyone else wanted to give it a try, it would be interesting to see other findings. It is certainly unintuitive and isn't representative of actual effects.
I have a MP40 on each side of my four foot tank, running in anti-sync, with the left side acting as the parent and the right as child. Because I also have my return running in the same direction (right to left), I wanted to reduce the max flow on the right MP40 so that the left could counter the flow and create better flow on the right side of the tank. I've tried reducing the right (child) max speed in Mobius, but was frustrated because it didn't seem to make any difference when watching the flow speeds.
The logical thinking is that the child max-speed should be a percentage of the parent, but clearly not the case. When playing around with it, in both Expanding Pulse mode and Lagoon Mode, this is what I found:
Expanding Pulse
- Parent pump max-speed set to 25% - GPH range of 1550 - 2280
- (1) Child pump max-speed set to 1% - GPH range of 1550-1580
- (2) Child pump max-speed set to 5% - GPH range of 1550-1700
- (3) Child pump max-speed set to 10% - GPH range of 1550-1850
- (4) Child pump max-speed set to 15% - GPH range of 1550-1990
- (5) Child pump max-speed set to 20% - GPH range of 1550-2140
- (6) Child pump max-speed set to 25% - GPH range of 1550-2270
Lagoon
- Parent pump max-speed set to 13% - GPH range of 1500 - 1940
- (1) Child pump max-speed set to 1% - GPH range of 1580-1595
- (2) Child pump max-speed set to 5% - GPH range of 1580-1700
- (3) Child pump max-speed set to 10% - GPH range of 1580-1860
- (4) Child pump max-speed set to 15% - GPH range of 1580-1935
- (5) Child pump max-speed set to 20% - GPH range of 1580-1950
So, it seems to me that the max-speed slider does not act as a flow percentage of the parent (at least in anti-sync), but more as a limited flow range of the parent. In both cases, 25% in Expanding Pulse and 20% in Lagoon, you hit a max of that variation in flow and it eventually acts as if it's 100% of the parent's flow. Going above these numbers does not affect the child in comparison to the parent. While keeping the max on the child to 1%, almost keeps it at a steady flow rate, which defeats the purpose of certain modes in many cases.
I plan to test this more, but in the case this was useful and anyone else wanted to give it a try, it would be interesting to see other findings. It is certainly unintuitive and isn't representative of actual effects.
Last edited: