Negative Positive
Title: Actually works!!!
Review: I use this in my 90 gal discus tankI have 2 of these to supplement my eheim 2028My water is clear and the readings are perfectI assumed these would be just a backup in the biofiltration dept.Apparently, they do a large amount of mechanical filtration, as well.I have one in each back corner and large amounts of debris settle back there.Perfect for the frequent Siphoning discii :) require.
Is the review positive or negative? 