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Old 02-15-2013, 11:32 PM
reefwars reefwars is offline
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Originally Posted by reefgirl189 View Post
It needs to clear 12' of head pressure. I like to oversize the return as it helps with overall flow to the tank. Currently using the largest Sedra pump and it works great, just needs a lot of juice.
at 12 ft what are you getting out of the 20000?

from the chart on the speedwave box the dc2640 at 12ft is about 900gph at 85w

from the chart in the box for the sedra it says at 12ft its also 900gph but uses 200w
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Old 02-15-2013, 11:54 PM
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Quote:
Originally Posted by reefwars View Post
at 12 ft what are you getting out of the 20000?

from the chart on the speedwave box the dc2640 at 12ft is about 900gph at 85w

from the chart in the box for the sedra it says at 12ft its also 900gph but uses 200w
I calculated roughly 750 gph (We have a couple 90 elbows the clear on the way up). I'm going to show this to the SO and see if he might let me upgrade. We've had some heafty bills lately and it's getting annoying. Now if only there was a cheaper upgrade for the iphones...
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Old 02-16-2013, 12:14 AM
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Quote:
Originally Posted by reefwars View Post
at 12 ft what are you getting out of the 20000?

from the chart on the speedwave box the dc2640 at 12ft is about 900gph at 85w

from the chart in the box for the sedra it says at 12ft its also 900gph but uses 200w
I guess it would depend on whether a new pump is required and how long a person plans to use the pump to see if there is any actual savings. 115w at 0.089 cents works out to $7.36/month. The price I found online for the DC2640 pump was $299 (not sure what you are selling them for) so 3.5 years to break even. Maybe pumps will be more efficient in 3-4 years time as well. If a new pump is required then DC is the way to go for sure, just to replace an existing pump to save money a buyer should do the math first to see if they are satisfied with the possible results. How the pump is being used will also effect the outcome, I'm calculating at 100% 24hrs a day but if a person doesn't require 100% the speed control on the DC unit can be dialed down to adjust flow as compared to an AC pump that runs at 100% all the time and uses a valve to control flow. This would further increase the power savings with a DC pump.
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Old 02-16-2013, 12:52 AM
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run your lights when power is cheaper. here in ontario, 7pm is when electricity is its cheapest. thats when my lights come on. this also has two additional benefits. In winter i keep the house cooler when we are all sleeping so having the lights on at night keeps the tank warm. In the summer, its cooler in the evening so having the lights on then keeps over heating to a minimum. I am home at 6PM so i get to enjoy my tank right up until i go to sleep.

use your return pump to drive your reactors - you can usually upsize your pump one model and use less electricity than running 3-4 smaller dedicated reactor pumps. This is very dependent on your pump selection so take the time to do the math.

you can use your ro waste water to fill your washer but be-careful, leaving it unattended will ensure a flooded laundry room.

skimmers and return pumps run 24/7. spend some good money on quiet and efficient models. the more expensive stuff has a better resale value as well.
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Old 02-16-2013, 01:33 AM
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Quote:
Originally Posted by intarsiabox View Post
I guess it would depend on whether a new pump is required and how long a person plans to use the pump to see if there is any actual savings. 115w at 0.089 cents works out to $7.36/month. The price I found online for the DC2640 pump was $299 (not sure what you are selling them for) so 3.5 years to break even. Maybe pumps will be more efficient in 3-4 years time as well. If a new pump is required then DC is the way to go for sure, just to replace an existing pump to save money a buyer should do the math first to see if they are satisfied with the possible results. How the pump is being used will also effect the outcome, I'm calculating at 100% 24hrs a day but if a person doesn't require 100% the speed control on the DC unit can be dialed down to adjust flow as compared to an AC pump that runs at 100% all the time and uses a valve to control flow. This would further increase the power savings with a DC pump.

we sell them for 279.00(i believe anyways, im not at work right now ) i agree switching for the upgrade just to save quick money isnt a good financial purchase but there are other benefits as well though when comparing to some larger ac pumps that make these good even if its for uprading.
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Old 02-16-2013, 01:35 AM
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I run dc pumps and LEDs, my power bill is higher than ever We need better ideas.
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Old 02-16-2013, 01:45 AM
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Just checking some readings the Waveline DC10000 draws 0.75A so around 85W or so at full speed. So as advertised, fairly efficient. One of my 300W heaters however draws 2.95A so closer to 325W, I have two of these and they are on a lot so makes you wonder how much I'm saving with LEDs in terms of power.
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Old 02-16-2013, 02:03 AM
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Old 02-16-2013, 02:05 AM
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Let me get something out of my mind about "power savings" by switching to:

LEDs: Alright, so typically, someone replaces one MH fixture (250W) to get a Radio G1. Some calculations:

Cost of MH fixture: $150-$200
Wattage: 250W
Monthly cost of electricity @ 8hrs lighting cycle and @ 8c/kWh: 0.250W * 8hrs * 30 days * 0.08 = $4.8 (+- 10% give or take) = $5.28 max
Yearly cost of maintaining (1 bulb change + electricity) = $70 + 5.28 * 12 = $133
Yearly cost of JUST electricity = $63.36

Cost of a PROPER LED fixture (I am not any generic fixture):
Two proven LEDs that I consider worthy are Radios and Mitras (flame me all you want but those LEDs actually have future; not vertex or razor!)

Radion (G2) costs: $660
Wattage: 140W
Monthly cost of electricity @ 8hrs lighting cycle and @ 8c/kWh: $2.69 (+- 10% give or take) = $2.96
No yearly maintenance other than electricity bill = 2.96 * 12 = $35.52

Savings with Radion (G2) = $97.48/year (including bulb change once a year)
Price difference between Radion (G2) and MH = $460

So to have a "gain with LED", you will have to use it for atleast, 460/97.48 = 4.7 years before you start profiting with Radion (G2).

I am not going to do the calculations for the Mitras (possibly costs around $1200 and with most output so possibly the years will almost be DOUBLE!).

So, instead of putting my conclusion, I would like to ask, suppose you buy a LED fixture today, would you be using it for, say, 5 years?

2. DC pumps: These are clearly very efficient stuffs since only DC can offer variable speed motors with low power consumption (war of current is coming back I tell ya! ). But once again, the cost-saving benefit should be done. I am not very familiar with pumps and so I am leaving it over here (I don't have the data on prices and how long they are in running mode, etc).

If you ask me why would I get LEDs and DC pumps (when financially permitted), I would say its because of:
1. Technology
2. Versatility
3. Trend ()

Last but not the least; I used to get flamed by lines like "don't cheap out in this hobby" and "leave this hobby if you can't afford a $50 refractometer" but now-a-days, I see people buying $700 LEDs to save like $100 a year! And I used to get flamed; cruel world
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Old 02-16-2013, 02:28 AM
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[quote=mrhasan;793618]

(Quote)




If you ask me why would I get LEDs and DC pumps (when financially permitted), I would say its because of:
1. Technology
2. Versatility
3. Trend (

(End of quote)



But most importantly, the environment.

Last edited by naesco; 02-16-2013 at 02:32 AM.
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