The flow rate of 15W pump is 600ML per hour, so the pulse bottle of 1L will overflow.

1. Now punch a few small holes in the pulsating bottle mouth to increase the water flow and prevent the water from overflowing too small. Of course, if your pump power is relatively low, it is ok not to make holes.

2. Cut off the bottom of the bottle again.

When the prototype comes out, the next one is simple. Just plug the filter material layer by layer, and remember to put the bottle mouth down. What's in the jar behind is the first time that the landlord made it.

As for what filter material to put, how to put it depends on your preference. I put nitrifying bacteria balls, filter cotton and nitrifying bacteria rings, which are relatively simple. The main bottle is not big enough to hold too many things. After all, I put them in the outlet of the upper filter box for twice filtration, and the inflow of water is equivalent to a rough filtration.

Into the water.

6. Try to see if it overflows. If it doesn't overflow, it's OK. Simple, but practical. With the original filter box, the effect is quite good and the cost is very low.