Hey @GrowThings! Canna has a very handy calculator for this on their website that allows you to specify your environment values and it gives you the calculated feeding schedule. I have went ahead and filled this information out for you based on your 27.7liter reservoir with standard water hardness (.04) and that schedule can be found here -> https://imgur.com/a/beapj32 and this of course contains a Rhizotonic schedule as well..... However if your reservoir is not 22.7l diary or if your water is softer/harder than .4 then you can VERY QUICKLY do the calculation for yourself on their website here -> http://www.cannagardening.com/growguide 😎 I hope this helps man I cant wait for the update this grow is looking solid.