I've been putting together an order of nutrients myself. Somehow between the three plants I've got going, the fact that I'm using 3.5 gallons of water and nutrients a day escaped me.
Empty bloom bottles sneak up quick but I hardly use much grow so my order is easy....a few 2 litre bottles of ionic hydro bloom. Didn't like the 5 litre bottle as it was hard to pour from.
Will try and mind to ask about buffered nutes this time too. When I asked about buffering additives they said it was ok if you were going away for a few days but that was about it.