Go Back   Aquarium Advice - Aquarium Forum Community > Saltwater and Reef > Saltwater Reef Aquaria
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 01-23-2003, 06:13 PM   #1
DHS
Aquarium Advice Apprentice
 
Join Date: Jan 2003
Location: Carrollton, TX
Posts: 49
Send a message via AIM to DHS
Water Pressure & PC watts

Yes I'm back with even more questions (figured my next tank I'd setup perfectly for once).
1) With a water pump from the sump is there a quick conversion from 0ft. pressure to say 4ft pressure so that I can make sure I'm getting a strong enough pump?
2) I currently have a 23 watt PC lighting over my 20g tall tank. I've read all about different types of lighting and how many watts per gallon one needs, but I've never seen what the PC watt is compatiable too. I just want to make sure that I get enough lighting for my new tank (40 Gal). I'm think of using my 23 watt PC and a 175 watt MH...or if I can find another PC to take its place since they are relitivity cheaper.

Thanks in advance,
DHS
__________________

__________________
Insanity is its own reward
DHS is offline   Reply With Quote
Old 01-29-2003, 01:37 PM   #2
AA Team Emeritus
 
Join Date: May 2002
Location: Fort Collins, Colorado
Posts: 1,022
Send a message via AIM to Anemoneman Send a message via Yahoo to Anemoneman
On the manufacturer's web site you should be able to get pump curves that show the decreasing output vs. head for your pump. It is different for different pumps, depending on the pump design. There may be a rule of thump out there? Basically if you size your pump for at least 10 times your tank volume per hour, you should be safe for up to 4' of head without having to do the math. example: 40 gallon tank - use at least 400 gph pump.

One 175 or 250W MH over a 40 breeder will be fine. The 23W PC won't do much unless you want to supplement the MH with actinic.

Mark
__________________

__________________
Mark
Anemoneman is offline   Reply With Quote
Old 01-29-2003, 03:25 PM   #3
AA Team Emeritus
 
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
As Mark said, you'll have to go to the website or look on the box to find the flow chart for the pump. I have noticed that the smaller pumps will lose a good portion of their flow in the first 4-5' while the larger pumps may not experience a loss until 6' or so. Also, add 1' of height for each 90 deg elbow that is in the plumbing on the pressure side of the pump. IE...if you have a 4' rise with 2 elbows in it, figure for 6' of head total. Remember that the 10x is minimum...you can go more without hurting anything...I have about 250gph in my 10 gal. Include PH's in the equation when you figure the total flow.
As far as the lights go, maybe use the MH and add another 23w PC...use the PC's for actinic? I'm not sure how long a 23w PC is, but I don't think you'll get good coverage on a 40g with just one.
Logan J
__________________
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Logan J
loganj is offline   Reply With Quote
Old 01-29-2003, 04:56 PM   #4
DHS
Aquarium Advice Apprentice
 
Join Date: Jan 2003
Location: Carrollton, TX
Posts: 49
Send a message via AIM to DHS
Well I thank everyone for the info on the lights....though I really was more interested in the info for the water pump. So by unpopular demand I give you a site that has the information:
Rio Flow Chart
ViaAqua Flow Chart
If anyone ever needs the info here it is for use.

PEACE,
DHS
__________________
Insanity is its own reward
DHS is offline   Reply With Quote
Old 01-29-2003, 05:11 PM   #5
AA Team Emeritus
 
reefrunner69's Avatar
 
Join Date: May 2002
Location: Cedar Key, FL
Posts: 1,663
The problem is figuring head pressure...it is not simply how high is the tank compared to where the pump is. There is frictional loss, there is gravity etc...To figure your head pressure accurately...there is a calculator for it on Reef Central. We appreciate the links...but I don't use either of those pumps, some may, but lot's won't. That is why it was suggested that you consult the manufacturer's literature. The flow chart for a Rio 2500 will not be the same as for a Mag 7, although they are comparable pumps.
__________________
Kevin

Visit Nature Coast Photography
reefrunner69 is offline   Reply With Quote
Old 01-30-2003, 01:39 AM   #6
AA Team Emeritus
 
Join Date: Oct 2002
Location: Chatsworth, GA
Posts: 4,071
Send a message via Yahoo to loganj
What kind of pump were you thinking about using? External or submersible? IMHO, the Danner Magdrives are excellent submersibles although they can be run external also. The only externals I have any experience with are the Little Giants and the Hydrothruster. The Hydrothruster is old and the impeller locks down occasionally due to (I think) a worn shaft. The Little Giant has never given a problem. I think fishfreek also uses Little Giants on his reef. I'm not a big fan of the Rio pumps because I have had trouble with their power heads in the past. I don't know anything about Via Aqua.
Logan J
__________________
Life is not measured by the number of breaths we take, but by the moments that take our breath away.
Logan J
loganj is offline   Reply With Quote
Old 01-30-2003, 10:51 AM   #7
DHS
Aquarium Advice Apprentice
 
Join Date: Jan 2003
Location: Carrollton, TX
Posts: 49
Send a message via AIM to DHS
I'm thinking I want to go with submersible, but either would work since I'm going to be building my own sump. I mostly need something that can hold a GPH of 400-450 for 5 ft (not that I'm pushing the water that high just better safe then sorry). I also don't have the $100+ dollars I've been seeing for some of the pumps (even eBay is expensive), so I'm also looking for a pump in the range of $1-$75...big range huh.

PEACE,
DHS
__________________
Insanity is its own reward
DHS is offline   Reply With Quote
Old 01-30-2003, 12:24 PM   #8
Aquarium Advice Regular
 
Join Date: Oct 2002
Posts: 105
These links should help some (though I am not sure how much):

Pumps
Friction loss, etc.
__________________
SW Beginner is offline   Reply With Quote
Old 01-30-2003, 04:03 PM   #9
DHS
Aquarium Advice Apprentice
 
Join Date: Jan 2003
Location: Carrollton, TX
Posts: 49
Send a message via AIM to DHS
SW that second link is just the best I've ever seen. Finally my questions are answered...and the spread sheet on the page makes all of it make sense. THANK YOU THANK YOU THANK YOU....sorry just excited to get a truely scientific answer instead of opinions. In fact it helped me decide that I'm going to get the Rio 2500 instead of a Mag7. Not only does it get better flow rate for the same amount of watts, but its also $15 cheaper.

Thanks again SW.

PEACE,
DHS
__________________
Insanity is its own reward
DHS is offline   Reply With Quote
Old 01-30-2003, 04:12 PM   #10
Aquarium Advice Regular
 
Join Date: Oct 2002
Posts: 105
You're very welcome! Still, for a $15 difference would get the Mag 7 over the Rio as it will, in all likelyhood, prove to be more reliable in the long run.
__________________

__________________
SW Beginner is offline   Reply With Quote
Reply

Tags
watts

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Water pressure to RO/DI unit natman2 General Hardware/Equipment Discussion 4 02-20-2006 04:00 PM
Python water pressure severum mama Freshwater & Brackish - General Discussion 15 01-01-2005 05:58 PM
Barracuda Water Pressure Bearfan General Hardware/Equipment Discussion 9 05-08-2004 11:02 PM
Need to find a pump to increase water pressure fishfreek Saltwater & Reef - Getting Started 4 03-02-2003 09:52 AM







» Photo Contest Winners








Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 05:13 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.