probably not spidermites, they reside under the leaves ... regardless, you don't 'feed' your plant soapy water for insect control ... you 'foliarly feed' soapy water, meaning spraying or misting the leaves, top and bottom ... soapy water in the soil will elevate pH, at the very least ... I hang a No-Pest Strip in the growroom, and have never had insect problems ... ALWAYS read the label instructions and warnings carefully, when using any chemical products ... an insecticide containing 'pyrethrins' is normally quite safe (made from marigolds), but I can't stand the smell of the stuff :wtf:, neither can the bugs, I guess ... neem oil is usually recommended, but I'll never know why :wtf: ... the stinky crap has to be repeated several times to work, tastes and smells awful, and sticks to the plant for weeks, usually ... and, the spidermites are usually still thriving, anyway ... No-Pest Strips :thumbsup: ... good luck