The one I got was ca. 400 rub/liter (ca. $13). The cheapest one I saw was like 250rub/liter ($8 or so) but it had sugar listed as an ingridient so I decided in favor of more fancy brands )))
UPD. made and install thread with the pics finally
http://www.aquamist.co.uk/vbulletin/...ead.php?t=2393