we buffer our
RO/DI as well. the water is in 5 gal carboys and once buffered, we drop a rigid airline tube into the opening and let it bubble till we use it.
are you adding the buffer to the water, or water to the buffer? you should always add the buffer to the water to minimize precipitation. this holds true when mixing salt as well. you should add the salt to the full amount of water then mix it to avoid
Ca precipitation.