Bing this question is on the main return pump, I post it here as I should

[Old Man Of The Sea]

The chiller and calcium reactor with the Co2 tank has arrived 1/2 hour agoe by FedX, And soon I will get the skimmer with its pump.
　
The question is on the return pump idea I have, the piping in place right now is 1" and it will all be taking down once the new stand is decided on and brought here. But is I were to have the Sequence ReeFlo Dart Pump, 3600 GPH as my main return pump, what you believe that the PVC piping should be?

Buddy

[Old Man Of The Sea]

New main return pump(s) idea, even that I not gotten any comment or suggestions on this topic, I will gibe it still a try.
　
　
A little update on my aquarium man who pick out what my MH reflectors would be in which all disagreed with it due to his lighting idea by having only three 250 watt MH, rather then four, that I figured on from day one of on the beginning planning of this SPS system. I sent him a email asking him a question, if he selected the reflectors he mention in his specs due to their the best he thought of for this tank, or is it was only due to that those reflectors were being discontinued, and the company placed the remaining few of that stock on a hugh sale to get rid of them. Following that line of questioning, James then agreed to do over a new lighting specs for the 240 gal tank. I told him that I had no wish to continue hammering around with it, that all or most agreed with his specs, providing I had far better reflectors then he selected for me. As is, the total cost is around $1500 for those specs, I only need to learn to just what K is totals too, as well total amps so that I split the connections, not to overload. even that each outlet handles 20 amps, the surge protectors I have only handles 12 amps. His idea was to try and keep the tank from over heating, even thou im too have a chiller and any number of cooling fans near around the tank.

Just one question his not commenting too as yet, if he could or not put in for me a closed loop system, for I told him that I remember when I first mention this too him, and his remark was, he didn`t know how he could do that. if I don't get me a closed loop put in, im then looking at a number of pumps for the required currents for this tank, I will not be bothering with maxi jet pump, I be only wasting time with those on this type of system.
I did however ask him on some other ideas for a return pump. His original idea was to use two pump, one around 850 gph and the other I think was less then 1100 gph. Im figuring that if he can not assist me by giving me a closed loop system, that I should have some better type of main return pumps. These are the links for the pumps i sent him in question for this project.


If we use two pumps for the two return lines, I selected these:
　
#27107 - Mag-Drive 9.5 *950 GPH* - $108.95
#27121 - Mag-Drive 12 *1200 GPH* - $137.95
　
Supreme Mag Drive 950 GPH Pump
Supreme Mag Drive 1200 GPH Pump
　
MD30RLXT 1" / 1" 960 gph 13.5
MD40RLXT 1" / 1" 1200 gph 15.4
　
At this link, I couldn`t copy exactly what I wanted to show him, but you can see for yourself here: And if just one pump, im thinking that were looking at a 2136 gph pump as the only return pump.
http://www.iwakiaquarium.com/
http://www.iwakiaquarium.com/pumps_overview.htm
　
Here is another link:
http://www.pumpcatalog.com/productdi...ryid=0&pid=269
http://www.pumpcatalog.com/newimages...oduct269-1.pdf
　
And another link: For i know that you will say that even 2100 gph may be too much flow rate, the largest in this models is at 2000 gph.
http://www.saltysupply.com/Iwaki-Pumps-s/236.htm
Iwaki MD100RLT Water Pump (Japanese Motor) 2000 GPH Price: $449.99 Price: $409.99
　
Or I use these two as two return pumps:
Iwaki MD40RLXT Water Pump (Japanese Motor) 1200 GPH $299.99
Iwaki MD30RLXT Water Pump (Japanese Motor) 960 GPH $229.99
　
On the above main pump return, it be due to the fact that drilling larger the bulkheads will not be so manageable.
　
What your thoughts on this?

Buddy