Over Filtering A Planted Tank

[BigIan]

I currently have a fluval 404 filtering the tank, i also have an ehiem 2322 sat in the cellar doing nothing.

Ive noticed the left side of the tank seems to be a dead spot should i add the second filter to aid water flow or would the increased water movement let too much co2 out of the water?

 

[cheesy feet]

I would say it would be fine.But atm i don't have a planted tank.If the co2 goes to low you could always jack it up a notch?

 

[lljdma06]

I don't know what to tell you, Ian. I have double HOB filters in two of my tanks, the 20g with CO2 injection and the 8g without CO2 injection. I don't have a lot of surface agitation in my CO2 tanks, but that doesn't mean I don't have a lot of underwater movement, which I think I do quite a bit of. The two things, IMO are different, and when I was measuring CO2 levels in those tanks, I was maintaining a consistant 30ppm, despite the underwater movement. My non-CO2 tank now, have both a lot more surface agitation and a lot of underwater movement, and that I think helps to improve gas exchange, which I think is needed when you are not injecting CO2.

It's up to you, really.

 

[AlexAndCarmen]

Over filter I use two cannister filters, together they turn over 2100l/h in my 50gal planted tank ,it definitely sorts out dead spots in the back two corners. I keep both outlets below water line, 1" below and pointing down just a bit and my CO2 level never falls below 20ppm. Both the canisters have a coarse sponge in the bottom basket and the rest filled with bio media no polishing fine filters. I find the water stays sparkley clean and no lose of flow when cannisters are used without that top fine floss media.
Alex