Most of the week was spent setting up the hydro grow. Needed to build a DIY chiller since air temp in our grow room is hot, and water needs to be a good deal colder. Fridge from kijiji, garden hose, fittings, and submersible pump all in were under $100 but knowing what I know now I'd likely go with a thermoelectric chiller (DIY, with power supply and temp controller) next time around. Looking forward to tracking metrics and seeing how it goes :). Seems there's a lot of contradiction in terms of level of nutrients recommended, max water temperature, using H2O2 to boost water temp that can keep algae and rot at bay, etc. Got my hands on some Hydroguard via Amazon... despite local shops saying you can't get it in Canada... so I'm going to go with that instead of H2O2 to start, despite water temp getting up above 21 C (70 f) during the day. Fingers crossed.
Update - keeping water reservoir tank under 20 C now by using reflective bubble wrap insulation on the reservoir itself and pipe insulation as well. It's a 10 C difference from the room temp, so I'm SUPER pleased with that.