filter questions

[m4_next]

Some newbie questions:

What is the best kind of filter? Wet/dry type or cannister? And what is the difference between cannister and wet/dry? They both can have bio, mech., and chem. filtration, so what really are the dif?

If I can only have one kind of filter, should I choose wet/dry or an external cannister?

 

[canarsie11]

What kind of tank do you need filter on?

We need that info to properly help you!

 

[m4_next]

Hi. For sure I will get a goldfish tank (9 goldfish in 90-100 gallon). I am also contemplating my first 50 gallon reef tank.

I've some experience w/ freshwater fish before, mostly using undergravel and power filters. But I have never used (or heard) of cannister and wet/dry filter until recently when I research on aquarium supply.

In general which style is better, cannister or wet/dry (or something else)? And what is the difference between the 2?

 

[DylFunk]

IMO the wet/dry bio wheels are the best since they give the beneficial bacteria alot more oxygen than the regular filters do and beneficial bacteria needs oxygen to flourish.

 

[mrV]

9 goldfish is a little too much in 100 gallons (450 liters (uk) or under 400 liters (us) ) Something like 4-5 is better. Those fish mess alot. And if they are "natural" goldfish, then they need definately larger tank. ("Natural" means not those veil-tails fish but fish that actually look like fish B) Natural is more like crusian carp. You know...)

Wet/dry filters are ideal filters, but they are noisy (Eheim wet/dry). I would buy one or two normal canister filters. You know, that those goldfish need very good filtration system and clear water. But if they are not "natural-shape" fish, then you have to keep those filters on that way, that filters don't make too muct water current in your tank. Those abnormal goldfish become easy exhausted because they don't stand quick water current.

Put sand on bottom, because it helps a lot when cleaning goldfish tank. You don't need to vacuum it like gravel.