Confused.. GPH question.

[Louie3]

Ok heres the deal:

I was trying to figure out how long it would take for me to siphon 5 gallons

it took me 4 mintues to siphon 5 gallons of water

This is my formuala

60/4=15 then 15x5=75 so then its 75gph. am i right or did i screw up?

if this is roght what size of pump will i need for bringing up water? ( in gph form) I was looking into a canister filter to do this, chioces are,
Aquarium Pharmacuticals RENA FilStar xP canicster filters
xP1 250gph $ 69.99+sh
xP2 300gph $ 85.99+sh
xP3 350gph $ 109.99+sh

ViaAqua Canister filter
Model 230 160gph $ 49.99+sh
Model 300 210gph $ 63.99+sh
Model 650 265gph $ 71.99+sh
Model 750 315gph $ 79.99+sh

[blueboy]

if you are considering trying to get a pump to return the exact same amount as a straight siphon it will be a dissaster waiting to happen, that is , if you could ever even get it to the point of being workable at all. you will deffinately need an overflow of some sort, to regulate how much water can enter the siphon. also, a siphon break, so that you don't have a spill in the event of a power outage. if you already have an overflow set up, then any of the filters listed would return enough, as long as it was clean, and was performing at it's best.

[Louie3]

i've all ready conqured the PO problem thats why I have the siphon tube inside a Powerfilter, so if the power goes out it can only take how much water is in the HOB powerfilter

[GaryP]

Gallons X (60/minutes) = gph

Hope that helps.

5 gal. X (60/4 min.) = 5 X 15 = 75 gph

So you were correct.

[Richard]

Just remember that on canister filters the advertised flow rate is at zero head pressure with no media in the canister. For exampe the filstar xp3 is advertised at 350 gph but with the media baskets in the flow rate is 180 gph at zero head. They have that info on the side of the box.

[Louie3]

i did not know that!!!!!! well as long as i get help on witch one. Richard do you happen to know al the other xP2 xP1 info?

[hammondegge]

be sure to have the return sectioned off to limit the return volume to your tank if your siphon breaks or the powerfilter fails.

[Louie3]

I have a fail prof plan! all i need is the filter

[hammondegge]

thats good to have