Quality control.
I had terrible experience on my last visit yrs ago. And vowed never to return.
The first shop I went, has been around well before 1996, I could smell oil from my breath on the first dive! My brand new 1st stage Apeks filter has been discoloured after two dives. The management admitted that they relied on other to fill the tank. So I left and looked for another one.
I went to the second shop and when I mentioned about smell of oil, they told me that they also relied on other to fill the tank. The management suggested that I should carefully choose the tank on the boat ie. have a smell of the gas!!! I just did that and had chosen the less obvious lots. That was a big operator.
I wished I had gone to Sea Explorers and dived with Swiss Felix.
Dived with Kurt yrs ago and met Swiss Felix there before he moved to Sea Explorers. Those were the time that only divers came to Alona Beach and no one tried to sell you anything. Set off to dive Doljo and Puntod with the DM at 07:00.