Cleaned out the large canister filter yesterday in the morning. Next canister will be self-priming! That was an hour or so. Filter was actually pretty clean, starting to wonder if the intake needs lifting up as it is getting hidden by plants.
in the arvo plus clean internal filter and re-arrange plants
The internal was caked solid with mud from the API laterite I added previous week so good to get that sorted. That was 2 hrs so decided to leave the other canister alone (especially as my filter cleaning is pretty aggressive).
Today tested water. Nitrates was down to 5ppm so adding a bit more ferts tonight. Gh
also down a tad but ok.
Ph (grrrr) - ph meter on co2
controller said 7. Dragged out digital ph pen which said 7.2, then 6.8, then 7.0. Hmm... Dragged out ph API test kit, did test, stared at colour chart, decided colours all look the same, gave up... Will try pen again tomorrow night as wondering if ph meter is reading low.