so here's an update.
the Reef Delete works but it is not as quick as they say. you have to do the same ones at least 2-3 days in order for them to truly die.
this is ok is you have a smaller tank but for larger than 200 glas or deeper than 24" its kind of more work than a Majano Wand or Kalk
with having a large tank, its truly more of a headache to use this than the old school Kalk way
if anyone is interested, ill sell it for 300.00
so my trial and error on my 300 gal display will save you 100 bucks and shipping time