Day 51 of flower and I am going to drain the rez and start the flush. Plants seem healthy. For the last week I have not been topping off the rez so emptying it will be easier, EC has slowly risen during that time. On the next grow I will be using 50l of solution in the rez instead of 100l to see how they compare.
@freshwaterjellyfish, I would advise it, I have already had two rather large spills due to the pipes moving. Not a good scene, at least it was all contained in the spill sheet.
@Huggomadd, Thanks a lot. I have had issues with the other tent, primarily not enough CO2 as I haven't been running air exchange, I have made a fizz pot to create CO2 from Hydrochloric acid and limestone, which kick started the other tent. I also had issues with the roots getting tangled amongst them selves so have just started with 4 plants this time. I need to circulate the solution more too as I think the corners of the rez are getting stale. Now the sun is out I have moved four of the others outside.