the Ph is the biggest part too so if u dont have a ph meter then i was recommended a Hanna i got it for around 125 at HTG when i read some threads on outdoor Alot say u gotta ease them out a feew hours a day to harden them up maybe 2-4-6- hours a day then they can go full swing in the sun .....also the bucket size for outdoors is usually alot bigger then indoors..
then u have the critters and shit
best of luck with everything ....ill watch cause love the lights ....