I mean from the same test - there's obviously a chemical reaction for the first colour change, and then another for the second. I feel like sometimes the first one leaves stuff that makes the water not go back to clear. But keep in mind I often spend waaaaay too much time staring intently at these things from a few cms away whilst working on stuff with Nic so I could possibly have gone test blindWhen you say "leftovers" are you referring to leftovers from the previous test or using too much powder?
Hahaha yes this forum teaches me new things everytime I log in! As for the lids, the tubes are the same and so the plastic you're viewing through will be the same. The lids are interchangable if you feel better swapping it over. I've noticed people putting the lids under their tests and it's an idea I'll be 'borrowing' when I record some videos for the site soonYes that is the viewing tube, I order a new one in my latest order from you received 14/1. Having said that I notice the libe on the 2 tubes I have are slightly different so unsure if that has an impact on my test results. I have yet to use the new viewing tube as yet.
Unfortunately, I cant get my hands on a speedstir anywhere in Australia so mixing manually for now.
As per needsajet response to your post, I am basically doing everything he says verbatim.
Speedstirs are a pain for Aussies because they're sooooo useful but so hard to find and expensive to get brought over. We tried to import them but it's not economical at this point, so we're always looking for alternatives or better deals on importing a batch. One day, one day. In the meantime I continue using mine which has started to fail, but I'm sure it'll hold on for another season *crosses fingers*