hey there today i just bought some special mix soil but the guy in the shop told me i can put plane tap water to feed the plants as it has a ph buffer or somthing my other soil that they are potted in is plargron royalty mix they are in 9L pots and are going in to 15 L pots with special mix please help me as they need to be repoted and dont wanna put my tap water witch is ph 7.8 please help as dont want to lock out nutes ;(
