Originally Posted by Pep
Not to hijack this good thread here, but what size tank would you go from internal to a HOB type of filter Angel? I am a total noob and in the midst of doing research for my first tank which is going to be 55-75G ...ish :) Thanks
I know you asked the question of Angel, but I'm sure she won't mind me chiming in. Personally I would never use a HOB filter. I did use them, back in the 1980's on all my tanks from 25g up to 55g. My "cons" with them were (1) it was not easy to direct the flow unless they had spigots (I think that's the term) rather than just a "waterfall", (2) they gave out much too great a water movement, and (3) if the power went out, they burnt out when it came back on because they would not self-start.
In the 1990's when I moved up to larger tanks, first a 90g and then a 115g, I followed the suggestions of others and got canister filters. I would not choose anything else. On smaller tanks, say up to 50g I would use a simple sponge filter.
My reason for using canisters and sponge is the same, you can control the water flow direction and the flow is, or can be set to, minimal. I have planted aquaria and this is very significant, as I've explained elsewhere.
The usually hard and fast current produced by HOB filters is not conducive to many fish, and certainly not to plants. Of course, some fish would be fine with this. The filter chosen for any aquarium should always be one that provides what the fish in the aquarium need. Forest fish and swamp/pond fish require very little water current; fish from fast rivers like some of the plecos require a stronger water movement to be comfortable.