Originally Posted by itsuki
honestly i started a npt so i could do water changes less.
Lazy. Ha ha, just kidding.
I totally feel you on that one.
But seriously, Diana Walstad also recommends once or twice weekly water changes (sorry, forget exactly how much) in the beginning until the soil matures. These are needed until the soil stops releasing excess nutrients and until the beneficial nutrients set up shop within that soil. Although, according to Walstad's theory, WC's are not needed to get rid of excess TDS's etc, they are needed in the beginning. I haven't actually read Walstad's book (I've heard reading it is as tough as chewing leather), but there's lots of accurate info on the AquaticPlantCentral forum if you haven't checked it out yet- she is/was a moderator there.
With the zucchini- don't lose heart. They'll figure it out. Mine won't even deign to look at the zucchini until it's been in the tank for 24 hours- after the first 24 hours, though, they start noshing. I leave it in there for 48 hours.