Little background on this one. I dose limewater for 1 second every 2 minutes 24/7. The peristaltic pump that does this has a rate of 250ml/m.
I also dose a carbon source (vodka/vinegar right now) every 4 hours via another dosing pump.
They end up at a T together and dose out the same end and spot.
This keeps the tip clean from calcium buildup and some fun chemical reactions...another thread
My sump gets a lot of bacteria buildup which is fine with me. Particularly right in the spot the dosing happens
I sucked in some of that and keep in mind it's hit consistently with some pretty high alk/pH 24/7 so didn't know what to expect.
Pictures and videos uploading now.