anyone no anything about canna terra professional... not plus

does anyone have any knowledge on this product as all I can find is very limited it's mainly all about professional plus...
I'm using it at the moment and my girl is 17 days old today and the tips moving inwards of some older leaves are yellowish brown dry and crisping.. not sure if it's an ovetwatering issue Ph or nute burn from hot soil (if it is)
please help

ok
check the ph of the soil as soon as u can ......if it is 6.5 not that

as for watering
do not water anymore untill u see the plant droop from lack of watering then water watch it to droop from lack of water (this is the time period it will get shorter as it gets bigger so if it takes 3 days for a droop to show u water every 2 and 1/2 days .......sooner or later that will droop too from needing more water then u shorten the time 2 days then every day and half then every day then every half day ...........that is if u are growing massive plants u know 4 feet by 2/3 feet wide)

as for feed ........nutr burn all the tips get fried and it is a deep green
yellowing is a sign of nutr lock out ..........or not getting enough if the ph is off then it is lock out adjust that and then increase the N dose for one or 2 waterings then back to your normal plan

thanks for the reply mate but I only have a water Ph pen so I have started Ph ing my water to 6.5 it was 7.5 or 4 from tap and run off was around 6.8 then these yellowish tips started appearing and few oldest leaves crisping up halfway ...
so now I ph'd down to 6.5 with a very very weak formulex added to tap water.. is this right or have I made things worse?

This is what I'm talkin about with the discoloration

your soil is to wet

u are getting lock out of N due to the fact the soil is always wet .....................let the soil dy out and droop then water it with a little higher dose of N .....if u have something with a weaker verison of N........u know something that is 1 -0.5-2 that is good thing lower simple N for the roots to taken in

your new ..........i got myself one of these when i started growing it helps u learn faster and allows u to check the ph with out run off testing
light lvl
temp
ph
water lvl

this will allow u to test the zones in the pot for water lvl .....the top layer might be dry but the bottom and the middle could still be wet