I thought I would do a little conversion cost analysis for my tank in crudest form so the details are left out
I currently generate roughly 12000GPH of random-wide spread flow in my tank using a closed loop on an OM and penductors on my return. This method requires roughly 640watts of continous power consumption 24X7.
To achieve similar statistical results I would need 4 Vortechs and the controller. Running at roughly 40watts per vortech 24X7 there is a 480watt delta between the two methods.
4 Vortechs would run me 1400.00 not including the controller but we'll leave it out.
480w X 24hr = 11520w daily = 11.52KWH daily
In the Puget Sound area KWH run about .80 cents per
The power cunsumption cost difference = 27.50mo
At this rate it would take 4.25 yrs to make good on the investment assuming all parts in both solutions require no maintenance and operate to spec.
Now lets break down a direct cost comparrison.
Dolphin 4700 = 245.00
Iwali 70RLT = 260.00
3 Penductors = 75.00
Locline and Plumbing = 170.00
OM 8-way = 350.00
Tot - 1100.00 plus about 26hrs of labor
This cost difference would pay for itself in about 1.5-2yrs if you tack on the controller to the Vortech cost.
No need to tear apart this high level cost comparrison because I didnt articulate all of the assumptions and details. My company pays me to do that, not you all
lol but overall for large tank owners like myself justifying these spendy but cool little devices doesnt pencil out so well.
For NEW tanks these could work well but I also know the vortechs cannot generate the smae type of broad multi-ditrectional flow my current method delivers. I'll rest easy knowing that I spend 300.00 more each year to have the more dynamic flow..
Now on my 210 gal fish only tank?!?! I think this is a pretty darn viable.