there not a scam. please don't put down a product you have not used. the gold range line is 100% different than the regular line you used on lettuce.
Ive used the liquid light with spectacular results. and its dirt cheap. For 60$ it makes like 80 spray bottles of it at full strength. I reccomend 75% strength
as far as the gold line, ive been using it since it came out earlier this year. I have had better results with dutchmasters gold then i did with canna. And it is sooo easy.
My reservoir never smells or has any gunk in it. I dont need any extra flower boosters or additives. My plants look great with no deficiencies or yellowing. My yields are up and my maintenance is down.
The only time i see yellowing is about 6 days into flush.
I even use there cloning gel ,replicator. Which works great to, i dip and stick in rapid rooters with 95% success with 7 days of cut.