I have alots of fish in the tank. Every three days I need to change the wool. As it is very tiring..... so now finding another alternative. Bigger piece of wool to collect more dirt.
As i have experience, if the wool is full pack of dirt, the water will flow to other place.
I have one times cover the area with full of wool. After back from holiday 10 days, the water flow from top to the next compartment. Lucky my partition is lower than the sump tank. Otherwise, my room will flood. ?...
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