Guys I really can't think of any reason a res change would trigger the slime. If you want you can simply use the add back method for now, which allows you to keep the same res for much longer. This involves adding like 1/3 nutes weekly, or a little with each water, to tr to replace what's been used. You will have to research the proper add back for your situation. I would say your plants are using very little for now, so I would personally just try to maintain the ppm for a few weeks until the roots are robust. This is the worst time of the year for slime, I have it myself in fact in my cloners right now. I haven't seen slime in years so I got lazy about adding tea to my cloners. Everything was fine for months until the deep summer hit, and BAM my cloners are full of snot. Keep in mind this is just water, not even PH'd, no organics or nutes of any kind, and it slimes over. I am being reminded of how different it is to fight slime instead of prevent it. Despite tea treatment and daily water changes, the clones are not rooting and the stems are gelled. I'm confident that if I start with fresh cuttings and treat from the beginning it'll be fine, but i've lost this batch. Thankfully there is not even a hint of slime anywhere else in my garden, suggesting that an established colony of beneficials will keep it at bay. This also reinforces my hypothesis that the slime has a lot to do with your local environment, and once a system is shown to be prone to slime, you need to use tea forever or switch methods.