Filter size

[LincolnEss]

Hi

I'm upgrading to a custom built 270l tank. I've seen 2 filters both with UV steriliser built in; one is 1000l/hr the second is 1400l/hr. I'm drawn to the 1400l/hr to give me 5-6 times rather than 3-4 times.

Would the 1400l/hr be too powerful?

Thanks

 

[PheonixKingZ]

I wouldn't spend the extra money on the UV ones. They don't really do anything to help your tank.

I would go with the 1000L/hr I did the math, and you would need a filter with 1075.05L/hr for your tank. (To be exact...) So the 1000L/hr is your best choice.

 

[LincolnEss]

Thanks. Can you let me have the formula for future reference?

 

[Treestone]

Hi

I'm upgrading to a custom built 270l tank. I've seen 2 filters both with UV steriliser built in; one is 1000l/hr the second is 1400l/hr. I'm drawn to the 1400l/hr to give me 5-6 times rather than 3-4 times.

Would the 1400l/hr be too powerful?

Thanks

Go with the 1400 lph for that size tank, most of the flow is reduced heavily by pumping it back into the tank I have a 1000lph on a 215l and its perfect so 1400lph on a 270 sounds about right. And don't bother with the UV as they don't work properly on canisters, they do however severely reduce free-floating bacteria in the aquarium so it can decimate green water and may possibly reduce the risk of infections, just don't expect it to cure anything, you would also have to replace the bulb every year

 

[PheonixKingZ]

Thanks. Can you let me have the formula for future reference?

Sure!

A 30g tank needs a GPH flow of 120. That means that however many gallons you have in your tank, the GPH should be 4x that. So what I did was converted 270L to gallons. (Which equals around 71g)

71g x 4 = 284 gallons. Then I converted it back to liters.

That comes out to 1075.06. (Which is very close to your 1000L/hr.)

 

[Treestone]

Sure!

A 30g tank needs a GPH flow of 120. That means that however many gallons you have in your tank, the GPH should be 4x that. So what I did was converted 270L to gallons. (Which equals around 71g)

71g x 4 = 284 gallons. Then I converted it back to liters.

That comes out to 1075.06. (Which is very close to your 1000L/hr.)

You have to counter in the loss of flow rate as the water travels through the tubing. Depending on your tubing length it may be actually 700lph or 800lph

 

[PheonixKingZ]

You have to counter in the loss of flow rate as the water travels through the tubing. Depending on your tubing length it may be actually 700lph or 800lph

Wasn't aware we were talking about canister filters...?

 

[Essjay]

Sure!

A 30g tank needs a GPH flow of 120. That means that however many gallons you have in your tank, the GPH should be 4x that. So what I did was converted 270L to gallons. (Which equals around 71g)

71g x 4 = 284 gallons. Then I converted it back to liters.

That comes out to 1075.06. (Which is very close to your 1000L/hr.)

All you actually needed to do was multiply his tank volume in litre by 4 to give turnover in litres per hour

 

[PheonixKingZ]

All you actually needed to do was multiply his tank volume in litre by 4 to give turnover in litres per hour

Well, I multiplied his tank volume (in gallons) by 4, then I converted it back to Liters - Sorry, math is so confusing.

 

[Essjay]

You needn't have converted to gallons and then back again, if the tank volume and the turnover volume are in the same unit, you just need to multiply by 4. It's when the tank volume and turnover volume are different that you have to convert.


I like maths. I got the top grade in school exams

 

[PheonixKingZ]

You needn't have converted to gallons and then back again, if the tank volume and the turnover volume are in the same unit, you just need to multiply by 4. It's when the tank volume and turnover volume are different that you have to convert.


I like maths. I got the top grade in school exams

Oh, silly me. Liters and centimeters confuse me, as I have learned to use inches and gallons.

 

[Essjay]

When I was your age, we used inches and gallons (UK gallons of course rather than US gallons). Over the years since then, metric has been adopted. Because I grew up using non-metric, I can work in both. When I was growing up we used deg F for temperature, then at university in chemistry we used deg C. So again I can work in both.


I'm showing my age now

 

[Treestone]

When I was your age, we used inches and gallons (UK gallons of course rather than US gallons). Over the years since then, metric has been adopted. Because I grew up using non-metric, I can work in both. When I was growing up we used deg F for temperature, then at university in chemistry we used deg C. So again I can work in both.


I'm showing my age now

Through fishkeeping, I have learnt the strange world of non-metric. Frankly, it scares me all these useless, hard to convert measurements which are all used in these predominately American fish forums and chats. Metric is easy 1 litre = 1 kilogram, 100cm = 1m = 1000mm, I could go on but I better stop for the sake of preventing this from becoming a rant.

 

[Essjay]

This is why I use the calculator on the forum a lot. That makes it easier to see what American gallons are in litres, for example. Or in Imperial gallons for that matter.

 

[BelaSmith]

Yes me too. I always use the calculator on the forum.