Northern light auto DWC

Day 43 10/08/2020 Today I changed the water of the fastberry, She had a little bit deficiency I guess so I upgrade the nutes. I'm surprised because she make some new stem and leaves with little buds (I saw 4 nice little buds in development). this will increase a bit the yield ^^. The northern light follow her growth nicely, I changed the water and upgrade the nutes yesterday and she seems to like it. Day 45 12/08/2020 They suffered of the heat, I have trouble to keep the temperature around 22°C, even with the ice packs I put 3 times per day. I have a kind of slimy roots since the rise of the temprature but the northern light seems okay. Next summe, I will forget the hydro, it's too difficult with this heat. Day 46 13/08/2020 I have some Pythium issues with very slimy roots (I loose the half lenght of the NL roots) and I had lots of slime on my bubblers (the bubbles had troubles to go out). After some research, I find that it's due to the temperature, the oxygen concentration was too low and the high temperature helped to pythium development. So I bought Oxyboost (12%, 35% is hard to find in my region), I put 5ml in my 4.5L bucket (prediluated with 20ml of water). It seems to work, but slowly, so I will upgrade te dose I guess (it's just a 12% concentration). I will change the water today because of the many little whit dot on my clay balls, fallen in the water. Day 16 NL 14/08/2020 I think about this problem of temps and I think I have the solution. I took the problem upside down and I don't chill the water but the air of the bubbler, putting my air pump in a cooler, above a big ice pack, with 2 smaller ice pack on the side. With this method, my pump take some fresh air (just 2/3 degrees less is sufficient for me) and she is cooled too by the ice pack (like this, the ice packs heats less) I try this actually and I will see the result