we don't use sponge power so haven't tested it, as for electro.... we are keeping the set up under wraps so to speak, but if your trialing it send me a pm and ill be happy to guide you...
Yeah, I use it sparingly but I'm certain it's just silicate, it doesn't do much other than result in more pineapple sponges in my sump, and diatoms on my glass, but I think my mangroves out-compete them.
I've sent you a PM. A more appropriate question I guess, what do you think of the palintest? I can't think of anything but Sarah Palin every time I say the name to myself. I'm very tempted with one, but I'm curious. How fast is test for elements such as K, Fe and I, as well as for cal/alk values? How hard is the test to carry out?