i dose micro and macro......does that involve phosphate/potassium ?
how do i test those is there a test kit?
You should be dosing phosphate already (KH2PO4), and if I remember correctly all your dosing amounts have been posted and checked, so that's probably ok.
The amount of potassium that comes from potassium nitrate (KNO3) and mono potassium phosphate (KH2PO4) is usually sufficient. (Potassium is the K in both those supplements.)
Nitrates may be higher than what you're dosing because fish waste also provides it. Same thing with phosphates. No worries there, extra won't hurt. Continue with normal 50% weekly water changes.
You can get a cheap phosphate test kit if you're curious. But potassium test kits are too expensive to indulge in just for curiosity's sake.
Finally, you've changed enough things at once in your tank that it is, for all intents and purposes, a new tank! I've personally seen "new tank" diatom blooms when changing well-established tanks over from low-tech to high-tech. So this algae isn't unusual unless it persists for more than a week or two.
Clean it if you wish, and otos will definitely grow fat and happy on it. But don't panic, as it's likely just a temporary issue.