I managed to test the peristaltic pumps today. To perform the tests, I had to replace the hose, as the one shipped with the pump was way too short.

The specs say the hose is 4.7mm in diameter, however when I measured it with calipers it was closer to 4mm, bellow 4.3mm, but I cannot be certain how accurate was that reading. I replaced the original hose with the 4mm one and the pump works. Comparing the new hose with the old one I didn't notice any difference in diameter.

The flow I managed to get was about 60ml/min, that is about 60% of the performance advertised by banggood, but for now I'm assuming it's because of the "smaller" diameter hose I used. I believe the 60ml pumped in a minute is probably the correct dose for my purpose.