Flora trio as well, I've heard of other growers using water 3 days after mixing. I've high runoff 6.5-6.9 since i started growing and have had zero issues and good yields, everyone preaches 6.0 in and out but in CoCo its in and out so fast it doesnt effect anything. But as soon as i started letting my mixture sit overnight i started getting the lower 6.0-6.4 runoffs. Wierd i know but everyone's tapwater is different.