Problem with under water filter

[amaruq]

My Fluval 4 plus is making me crazy. The Green button saying the flow is plugged is right up. I changed the filter material..nope nothing...I stripped the head and cleaned it best I could. Took Propeller out and cleaned in there.

I put it back and still the green thing is up saying flow is low?????

Any ideas????? The thing is clean! I even moved the spout so that it's not pointed to the bottom of the tank????

[vince0]

could the indicator be stuck?

[thegrandpoohbah]

I may be mistaken but when I had my Fluval 2 Plus filters, the little green indicator being in the up position meant that the flow rate was good.

[amaruq]

hmm I wonder if your right???? cause it's not stuck I can push it down and right away it springs up?

[thegrandpoohbah]

Yup, the flow of water pushes it up. When the flow drops off (because the sponge gets full of gunk) the indicator drops down and exposes a red mark on the side of the filter.

[OldMan]

Poohbah is right. The green indicates good flow. As the flow drops, the pressure under the plunger drops and the red painted background is exposed. The red is a plugged 4+.