who makes quality freshwater filters?

[davehejl]

I have a 46 gallon tank with 4 koi and one of them is 17 inches long. I am running 2 over the tank marineland filters just to keep it clean. From reading reviews and my own experiences they have had a quality down turn. Who make good filters these days?

 

[Thyra]

From what I understand filters are really primarily to aerate your tank and help harbor beneficial bacterial. I use a siphon to clean my tank. I have never had any koi, but from what I have learned on this forum I am going to say your tank is way too small for 4 koi and no amount of filtration will change that. Let's see what other have to say.

 

[KcMopar]

You need a much bigger tank, maybe a pond not a filter. Any filter you buy is going to be a waste really. Your water quantity amount is not enough to support (properly) the amount of fish you have. That one 17" koi would need a couple hundred gallons of water.

 

[OrangeCones]

I have a 46 gallon tank with 4 koi and one of them is 17 inches long. I am running 2 over the tank marineland filters just to keep it clean. From reading reviews and my own experiences they have had a quality down turn. Who make good filters these days?

In my experience, Marineland makes an ok-ish filter, but you are trying to run two go-cart engines to power a semi-truck! If its a 'standard' rectangle aquarium, 46 gallons is roughly 40" by 16" by 21" tall. Four koi and one is 17" long???!!!

I agree with other comments, the tank is way too small to house any koi, and no number of filters you put on could keep up with the waste output.

 

[davehejl]

so what is a good brand of filter

 

[KcMopar]

Marineland and oceanic work for me.