水草情迷

Yesterday i went to "water grass shop" to see wether they have Tropica Master Grow.
The boss said they only had 90L version.
Finally the boss let me bought with a small amount.the price is:
$100 for 500ml: Actually they just found a empty "green tea plastic bottle",and used it to fill for me.That bottle is 500ml.

I think the price is good,what about you?

When i arrived home,i used iron test kit to test the stuff.And the colour change into deep blue after the one drop of the stuff is added.(i use azoo)
i dont know selling TGM in this way is acceptable or not
if every shop sell in this way ,the sale of small version will be affected ,right?:roll:

But as a consumer, i dont care!