Does water hardness affect the growth of crypts?
My entire planted tank career, I've been blessed with extremely soft water out of the tap, around 2 dGH and KH in Boston, and around 1 dGH and KH here in Portland. I've successfully grown (and killed as well) some of the most difficult plants in the hobby, Erios and Toninas and fine leafed Rotalas and such, but I have never, not once managed to grow a really nice looking crypt wendtii.
Whether high CO2, non-CO2, EI, PPS, aquasoil, eco complete or topsoil, my wendtiis always look sickly, and my petchiis and lucens often don't look to well either.
Is it that my water is just too soft? I add 1-2 dGH in the form of GH booster to little affect. Do I need to really crank up the Ca and Mg additions? Do I need a higher KH? Do crypts grow just fine in super soft water and I'm screwing up something else?
HOW DO I GROW A NICE LOOKING WENDTII?