DSPS Tank From Thailand (1000 gallons+)
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Jay Fortay
Uber Member
Ching, will you please explain in a little more detail about your Red dragon adjustable speed mode, and how it knows what speed to pump at to keep the levels consistent?
Thank you.
Thank you.
ccampbell57
Premium Member
Ching - awesome build. Kudos to you!! I dream about the BK...skimmer porn 
Can't wait to see the end product
Can't wait to see the end product
VegasReefer
Premium Member
For a while I thought that Jay Fortay was beating a dead horse with a stick, then I reread the thread, and saw that there was no overflow weir.
I would assume that with the drain set up you have, it will still just be a simple matter of filling the tank to the overflows, then filling the sump to its max non-running level. ( IE what the max you want with the return pump off ). Turn on the pump, and mark how far down the water in the return section runs once it equalizes.
Doing quick math, your tank holds 24.93 Gallons per inch, From top of tank to mid point of your returns is 3.937 Inches. ( 10 cm ) Assuming you are using The largest common size metric PVC ( 90 MM ) that puts your lowest drain point at 5.7 inches .
This means your sump overflow capacity would need to be 142.3 Gallons ( Top of tank to bottom of overflows )
Since no one runs there tanks at the very edge We can take it down ~2 inches and remove 50 of those gallons from the mix. This would also give us the maximum size of the return chamber. The return chamber must be smaller than the amount of water displace if all return lines where clogged. This would be ~50 Gallons so a return section of less than 50 would be safe .
As long as the pumps flow is less than the returns maximum flow/2 there should never be any problem. 3.5 inch Shed 80 pipe has a max flow of ~170 Gal/min or 10200 gal/h Multiply that time the number of overflows ( 4 ) and we get a total capacity of 40800 gal/h. Since the pump does 13,208 Gal/h ( 50,000 LPH ) it will be well under the safety threshold of 20,400 Gal/h.
So in Conclusion:
Total sump capacity minus running water capacity = >93 Gallons
Total Sump return running capacity = < 49 Gallons
Ps. I take no resposibility for my math and converting Metric to Imperial measurements. The sooner the world realizes that the US is azbackwards and will never use an easy system like the metric system the better. ( BTW that was Sarcasm )
I would assume that with the drain set up you have, it will still just be a simple matter of filling the tank to the overflows, then filling the sump to its max non-running level. ( IE what the max you want with the return pump off ). Turn on the pump, and mark how far down the water in the return section runs once it equalizes.
Doing quick math, your tank holds 24.93 Gallons per inch, From top of tank to mid point of your returns is 3.937 Inches. ( 10 cm ) Assuming you are using The largest common size metric PVC ( 90 MM ) that puts your lowest drain point at 5.7 inches .
This means your sump overflow capacity would need to be 142.3 Gallons ( Top of tank to bottom of overflows )
Since no one runs there tanks at the very edge We can take it down ~2 inches and remove 50 of those gallons from the mix. This would also give us the maximum size of the return chamber. The return chamber must be smaller than the amount of water displace if all return lines where clogged. This would be ~50 Gallons so a return section of less than 50 would be safe .
As long as the pumps flow is less than the returns maximum flow/2 there should never be any problem. 3.5 inch Shed 80 pipe has a max flow of ~170 Gal/min or 10200 gal/h Multiply that time the number of overflows ( 4 ) and we get a total capacity of 40800 gal/h. Since the pump does 13,208 Gal/h ( 50,000 LPH ) it will be well under the safety threshold of 20,400 Gal/h.
So in Conclusion:
Total sump capacity minus running water capacity = >93 Gallons
Total Sump return running capacity = < 49 Gallons
Ps. I take no resposibility for my math and converting Metric to Imperial measurements. The sooner the world realizes that the US is azbackwards and will never use an easy system like the metric system the better. ( BTW that was Sarcasm )
chingchai
Premium Member
I took video clip from ReefDepot booth at Aquarama for the operation of Red Dragon pump.
Hope this helps.
For the speed, I have to manually adjust to the proper level.
http://img190.imageshack.us/i/sdc11257.mp4/
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