I am part owner of a state certified cultivation facility, so I have plenty of experience with hydroponics stores and the way they are run. While prices can vary considerably from one store to another, Advanced Garden Hydroponics is the first one that has blatantly stolen from me.
I went here to buy a simple graduated measuring cup. Upon checking out I was informed by the cashier that the total is $7. Overpriced for a simple plastic cup, and I thought it was strange that it came to exactly $7 and no change, but I handed over $7 cash. It appeared that the cashier did not intend to give me a receipt, so I stood there until he asked if I wanted one.
Later that day I took a look at the receipt and saw that the total was actually $6.88. 12 cents is not much, but I was a bit irritated that they had not charged me what the actual price was. I called them up to voice my complaint, thinking that perhaps there was a misunderstanding. I was informed that they "do not give change". I assume this means that they round all transactions up to the next dollar.
I was shocked that any legitimate business would that this is a legal practice and was honestly speechless when I heard the words come out of his mouth.
Don't buy from these con artists... not only do they "not give change", but all their prices are about double of any of the other hydro stores I have visited. They don't even put their phone number, name, or any other contact information on receipts... that should tell you something.