Here we go again. can for 75 Gal.

[tknjk]

I plan on it being a SA cichlid tank.

 

[SUNFLOWER]

yes you are right it depends on fish and stocking of tank I always over filter and understock and never over feed . I have two filters for all 6 of my tanks .

 

[Merbeast]

Cichlids can be messy, but the Emperor 400 and the XP3 should be able to handle a moderately stocked 75gal tank of them.

 

[mcsx]

eheim's do good

 

[Wolf3101]

I run a large number of 404/405 Fluvals and will continue to do so. Far simpler to servace and a much better design IMO. The Renas are popular primarilly because of price. The 405's can easilly be picked up on line for $120.00 or so...sometimes less. The flow path is superior...the mechanical foam is seperate from the 8 compartment media baskets allowing greater flexability and the reliability and parts availability is top notch.
The Fluvals are also MUCH easier to prime and quite a bit quieter than the Rena's I've tryed along with a greater real world flow rate as judged by my in line flow meters.

 

[Merbeast]

Best can's are eheims... then fluvals... then renas. Magnums are good mech and chem filtration but are noisy compared to todays canisters.

BUT, an XP3 and an emperor 400 will do fine for you.

 

[ercnan]

Tank size is not the only component to look at when chosing a filter. What is more important that the tank size is the bio-load in the tank. If you are going to have 4 oscars in the 75 (which I would not do, but I've seen done), you would need much MUCH more filtration than a heavily planted 75 with a couple of discus and some tetras. I honestly would expect MFKers to ask the pertinant questions before jumping into pat answers.

P.S. There CAN be too much filtration, especially if you have slow water fish (like discus) or lots of plants.

Would you care to explain further on the P.S. ?

 

[tknjk]

I think he might be talking about too much current.

 

[ercnan]

I think he might be talking about too much current.

I was thinking that, or CO2 outgassing on planted tanks, which is the same thing I guess.
My argument is no you cannot over filter a tank, but yes you can overcurrent one.
Current is easily dispersed/diffused in such a way as to not stress fish/plants that don't like it, but still keeping up the filtration flow rates.
I've had 2 AC110's on a 29 before, and you would think it's a washing machine with bare spots in the substrate from the outflow, but a couple well placed sponges caused even flake food to pretty much stay put.
Plants moved not at all, and fish could hover motionless anywhere without so much as small corrections.