Definitely, although even some of the new growth starts to look bad every day or two. I'm cutting around 3-5 leaves every couple days. I ph'd down to 6.0 last night after the fresh dose of chlorine, and checked again a few minutes ago. I was expecting it to be back at 6.4-6.5, but it only rose to 6.1 overnight. Maybe there was some bacteria that didn't die of with the 1st dose, and was affecting the ph. From what I've been reading, my doses are on the low side, so maybe that's possible, but there's so much conflicting advice about how much to use, so I'd rather be safe and see how the plants take it.