If you don't like the look of them, you could always cover the compartments in the black sticky background (called oyama paper on other sites). This would also be beneficial for the filtration as it provides a completely dark environment which the bacteria prefer.
Some people have been comparing them to sumps, which I disagree with as the media is not submerged ... more like a trickle tower.
FWIW
P.s. I used to run an OHF on my 90, but now I've got a sump on my big tank and a cannister & HOB on my planted 55..
Some people have been comparing them to sumps, which I disagree with as the media is not submerged ... more like a trickle tower.
FWIW
P.s. I used to run an OHF on my 90, but now I've got a sump on my big tank and a cannister & HOB on my planted 55..