wet dry filter --???

[Jgray152]

Yes I should have worded it differently. I phased that poorly.

IMO back siphoning will ONLY over fill your sump from a poorly thought out sump system.

No problem bud Happends to me all the time.

 

[NOLAGT]

Well. The flow rate has nothing to do with how much water is going to be siphoned out of the aquarium when the pump shuts down.

You also need to consider the volume of water in the piping. For 2000 GPH, I think you need 2" pipe. If you have 10' of 2" pipe, you will have roughly an extra 1.62 gallons of water in the piping its self. 15' is equal to about 2.43 gallons. This is another variable you need to consider on top of the siphon volume from the aquarium.

I would like to know how it justifies the size sump according to the flow rate.

It can help, but surely not to be soley dependent on.

Also, just for an example. A 20 gal sump, is not just a 20 gal sump. There is a big misconception with this. What you really need to do is look at its dimensions ad the "actual" holding volume. Not the rounded off number from the manufacture.

20 Gal Long: 30x12x12 = 18.2

20 Gal Tall: 24x12x16 = 19.4

When you figure the water level in the sump that it will be when its running, say this is 8" high.

20 Gal Long: 30*12*8 = 12.38 Gallons
20 Gal Tall: 24*12*16 = 9.91 Gallons

When you pick out a tank such as a 55 gallon, there is really only one standard size so you don't have much to worry about.

55 Gal. 48x13x20 = 52.7 Gallons.

Now for a real example.

240 Gallon aquarium. 96x24x24 = 237.77 Gallons (not factoring for glass thickness)

1" water level drop in the aquarium would be = 9.91 Gallons
2" x 10' piping = 1.62 Gallons
8" Sump water level when running in a 55 gallon = 21.47 Gallons

All of which adds up to 32.99 Gallons. You have an extra 22 Gallons of room which will be lessend when adding lots of bio media.

Yes that calc is not an exact sience..I just use it to fig a round about min...and I add a little bit for pipes and what not. Also your bio media doenst take up 100% of the room...like 10gal of scrubbies doesnt take up 10 full gallons...but I have no idea what it really takes up so I just keep all the #'s as estamets.

 

[Jgray152]

Also your bio media doenst take up 100% of the room...like 10gal of scrubbies doesnt take up 10 full gallons...but I have no idea what it really takes up so I just keep all the #'s as estamets.

Correct. I eventually will figure out "roughly" how much actual volume a specific media takes up when you fill say 1 gallon of area with it.

 

[Jgray152]

Yes that calc is not an exact sience..

My calc will figure to a science

I just use it to fig a round about min...

Mine "can" figure a minimum but with user defined safety margins, you will get an optimal size and if you adjust the "additional volume" you get a overkill sump

 

[NOLAGT]

Correct. I eventually will figure out "roughly" how much actual volume a specific media takes up when you fill say 1 gallon of area with it.

That would be good to know. You have to fig it for different bio media typs becasue im sure its not all the same.

 

[Jgray152]

Exactly. The three main types I wan't to figure out is bio balls (specific size), bio bale and scrubbies.

 

[NOLAGT]

you get a overkill sump

Thats what I wanted but since my stand didnt get built exaclty how I wanted I can only fit a 55 in there. I only have about 15" in the narrow part between 4x4's that are the legs. A 55 is going to be close too...I am going off the stuff I have seen for bio balls being good for 1gal of balls/35gal of freshwater. I went with 25gal of fresh and im going to see if I can get away with 10gal of bio media. I fig since im using scrubbies they are supposed to have even more area than bio balls maybe 25gal of water/1gal of scrubies is a way safe estamet. in order to get the room I need for extra water from the tank in the power outage I cant have a real big bio area. I also am going to use filter socks so 6" of the 55 will be full of water....bio area would be 12x12x17...6" of water....would leave about 30x12x15 open or about 23gal. Your thoughts?

 

[Jgray152]

10 gallons of bio media should be enough. That equals out to 37 liters which is alot.

So you are using .15 liters per gallon. You could use .13 liters per gallon = 31 liters or 8.19 gallons. Especially with scrubbies.

12x12x17 = 40 liters

L*W*H* .0164 = liters
or,
L*W*H* .0043 = gallons

Looks fine to me.

 

[NOLAGT]

10 gallons of bio media should be enough. That equals out to 37 liters which is alot.

So you are using .15 liters per gallon. You could use .13 liters per gallon = 31 liters or 8.19 gallons. Especially with scrubbies.

12x12x17 = 40 liters

L*W*H* .0164 = liters
or,
L*W*H* .0043 = gallons

Looks fine to me.

What about 2000gph going through a 12x12 drip plate (pre fab plastic peg board from home depot)

 

[Jgray152]

Actuall, I wasn't thinking about the 2000 GPH through a 12x12 area. you may want to double that. I don't know how many holes per inch and how big they in the pre fabbed board. If you don't use a drip plate I feel you could use the 12x12 area with some egg crate on top with some sponge that should be able to equal out the flow? I don't have any experience with that much flow. If you double the bio area, that will increase the contact time with the media as well with such a high flow rate.