[Aurie]

I don't have a 75 but I'll be setting up a 55 austrailian rainbow tank and I'll be running a 2217 and a power head. If I needed more I'd wait for a sale and get another eheim. I just picked up a 2213 for $75 and I've seen the 2217 as low as $105 on a daily deal at marine depot. You have more than enough room for both of the out flows. Right now I have both a 2215 and that 2217 on a 46 bow and it's more than enough flow for the tank. sometimes I have debris floating but that is my usual indication of water change time and I also have a pleco and she likes to stir everything up.

 

[jrman83]

Do you have enough for your tank size, probably. Most people filter by preference. For instance, I have a 2217 on a 29g. On my 75g I have an Eheim 2075/2229 and a small powerhead.

 

[chocological]

People throw out numbers all the time about how much GPH is necessary.
But fish have different needs and eating habits and whatnot.

I've found sticking to 5x turnover rate an hour is good for me.

 

[Rob in (ca)]

As long as your filter is working property and you don't overstock, and do 50% water changes every week, you will be fine.

 

[Fujiija]

So if I have debris still floating in the water, I really should just adjust my powerhead position and reposition the canister intake tube instead of adding another canister filter? I am diligent about cleaning the canister, so I know that is not the problem. I also do a 50% water change each week.