Is one better than the other? I have purchased the green colored NaturalAire filter (24 x 36 x 1) and cut it to fit a milk crate that I'll be using with lava rock and poly batting. After reading some other posts, I only see people using the blue NaturalAire. No mention of the green. Does anyone know the difference and is there a preference?
I recently had a client call me for an "emergency", a catastrophic leak whereby the pond was virtually emptied within a period of less than 24hrs. This person suspected that a line had burst, a fitting had failed, the liner had a massive hole or that the waterfall had leaked.
I soon found that the worn filter material in the AquaScape MiniFalls waterfall filter had been replaced (worn out and ragged from too much cleaning, I suspect, and the liner sold with the unit isn't that great to begin with) with quilt batting purchased from an aquarium outlet.
The incoming water from the bottom of the waterfall filter pushed the quilt batting up, against the flagstone cover and had blocked the waterfall filter weir. The pump kept on a-pumpin' merrily away, the pond water doing a great job of watering the bone-dry lawn.
Didn't suspect it right away as the surrounding lawn was dry, as was the mulched soil surrounding the waterfall weir.
I replaced the quilt batting with proper Matala (AquaScape brand) woven mesh, cut to friction fit into the existing waterfall filter. That stuff won't fall apart and can be rinsed and rinsed and rinsed. I myself wouldn't use a filter designed for air filtration for water filtration.
Black = coarse weave
Green = medium weave
Blue = fine weave
Green is by far the most effective in most set-ups. If used in tandem, they're generally used with a black under a green, or a green under a blue.