You sure you dosed the correct amount? And how long did you run the chemiclean threatment? You can try to run it to 72 hours. Most of the time you'll see significant improvement at 48 hours but some strands take an extra day.
Something else is going on as well. Could be dinos, chrysophytes or just diatoms. Hard to tell without a microscope and all of them need different ways to threat. A cheap microscope from
Amazon could already help out a ton.
However, there could also be an easier way out if above doesn't work for you. Since cyano, diatoms and dinos are all photosynthetic and you only have a couple of corals, you could temporarily house your corals at a friend with a tank, your LFS or by setting up a small tank yourself. Then turn your lights off for a while and avoid bright- or direct sunlight, until things disappear on their own. Meanwhile I would add beneficial bacteria like MicroBacter 7.
Eventually it's still good to find the root cause if possible. Wether it would have been a nutrient unbalance, a lack of flow, a mini recycle, silicates in your RO or improper light settings. Just so when you turn on the lights, you're not heading to the same direction again.
