Water Turn Over

[nitro7]

hi all
just a quick one

how many times shpuld your tank water go through a external filter if you fully stock it ?
just so i can work out for a new external for my 175 lts tank

cheers
eric

ps have been on here for days going through the treads on externals,got my head done in lol

 

[Truck]

have a browse, and look for one, that will do roughly 5* turn over for a community or maybe a bit more

 

[foley69]

ideally a turnover of x8 of the capacity of water is teh best way to go in my 200litre i have a fluval 205 and a fluval 4 they come to around 1600LPH so thats a turnover of 8 so anything between 6-8 is fine

 

[nitro7]

ideally a turnover of x8 of the capacity of water is teh best way to go in my 200litre i have a fluval 205 and a fluval 4 they come to around 1600LPH so thats a turnover of 8 so anything between 6-8 is fine
[/quote
some people say 4x some say 8x?
so i need something inbe tween 680 lts to 1200 lts
is that corect
cheers
eric

 

[Truck]

about 1000 lph should be enough

 

[nitro7]

about 1000 lph should be enough

been looking at filters and is the out put they put on them currect or do you subtract some of the output when its got filter media in it
cheers
eric

 

[Truck]

yes its current, but when they say 1200lph your not necessarily getting it

its generally a bit less, because of clogging etc

 

[nitro7]

yes its current, but when they say 1200lph your not necessarily getting it

its generally a bit less, because of clogging etc

cheers truckasauras
just got to sort which one now lol

 

[rdd1952]

On thing to keep in mind is that you can never have too much filtration. It could be that you end up with too much flow for the fish you keep but even if your filter turns the water 20 times an hour, the only down side is that you really paid more than you needed to for your filter.

As far as a mimimum is concerned, I tend to lean toward 5 times an hour. That also depends on the fish you want to stock. For community fish like tetras and the like and normal stocking, then 5x is plenty. If however, you are looking at messy fish like plecos, goldfish, oscars, etc. then you need more simply because there is more waste to process. Same applies if you plan to overstock the tank.

 

[always4lora]

if you are running two filters would it take longer to cycle them rather just the one ?

 

[Truck]

no, bacteria grow at a specific rate

 

[nitro7]

On thing to keep in mind is that you can never have too much filtration. It could be that you end up with too much flow for the fish you keep but even if your filter turns the water 20 times an hour, the only down side is that you really paid more than you needed to for your filter.

As far as a mimimum is concerned, I tend to lean toward 5 times an hour. That also depends on the fish you want to stock. For community fish like tetras and the like and normal stocking, then 5x is plenty. If however, you are looking at messy fish like plecos, goldfish, oscars, etc. then you need more simply because there is more waste to process. Same applies if you plan to overstock the tank.

cheers
ive only got 2 community tanks
the one i want to put the external on is a aqua one ufo corner tank it got 10 zebra danios,7 neons,6 corys,3 barbs,6 shrimp and a bn cat fish/
the only reason i want a external is because i dont like the power head that is stuck in the middle of the tank
ps its 175 lts
cheers
eric

 

[always4lora]

i have a fluval 305 on my 150litre ish 4' tank and it does 1000lph so props around 700-800lph in practice. decent filter, maybe if you wanted you could go for the 405 which is 300lph more .

I also put a fluval 2+ internal on it at the other end to keep a decent water circulation .(360lph out of that )

 

[nitro7]

so if i put a fluval 305 on at aprox=800lts thats 5x turn over
just say that it has 6ins of filter media in it ,thats x amount of bacteria which filters you tank(you with me so far )
if you could double the amount of filter media ,that would double the amount of bacteria ,right
so would this be the same as having 10x turn over

cheers
eric

 

[Truck]

no, it would get slower