I had Kanox as my private guide for one day, he was great. Koman was the other DM I dived with, he was great too. I brought my own rinse bucket for the camera and asked them to fill it up every morning, was so heavy it took 2 people to carry to the boat - but they did it all with a smile.I was unlucky like you too in searching for Mola Mola in Crystal Bay on 20 July & 18 August. As you mentioned the water was too warm for them.
I was with Geko too on 12 July, diving in Padangbai with Kanox.
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Had a chance to chat a bit with Cedric before he took his kids to Lombok.
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September-October would be better to see the Mola Mola this year I think. The last time I saw them was in 20 September 2019. I saw 4 of them in Blue Corner at 40m depth, as Crystal Bay was invaded by Great White Shark at the time, as shown, below:
One thing I was surprised by is Geko caps the group dives at 45min, which is pretty short. Everyone surfaces together they don't allow buddy groups to stay longer. At Crystal Bay and Manta Point one person ran out of air at 35min With a private guide you get 60min. Private guide was IDR500k per day irc, worth it imo. (Ironically when we got to our next stop, Mermaid I, they gave us 70min dives every time, which is the longest I've seen on a liveaboard).
My strategy for next year will be to ask Geko periodically if the water is cool enough, and once they say yes / start seeing the molas with regularity book a last minute trip for the week after. A lot more flexibility if not timing with a liveaboard. I think it's time I give Bali a full week anyway, didn't get to dive Tulemban at all this time.