I just incurred a rotator cuff injury from self back patting
I'm poor at ID usually lol but those guys we have to watch out for like a hawk in the big peroxide threads, they die instantly usually if any peroxide is in the tank
Your algae is normal not due to a cycle but because the grazers to remove it naturally aren't set yet...it should be hand removed cleaned and siphoned out as needed until natural balances set in. The tank looks great and those animals are in no harm, you have enough dilution to simply do it like you did at no big deal. A quick fish purchase would have been too much, but not a few snails and a Shrimp that's harmless and better than watching a barren tank. Since we can't ammonia digest test, and the two part reading is the only way to know if your cycle can manage fish, what I'd do with your tank is wait 5 weeks before adding a fish and go buy some corals and frags tomorrow as long as the lighting is good, get to reefin
If you bought four zoanthid frags, two candy canes some acans and a round of rhodactis corals, your tank params would change by zero factor. The color factor would rise. Ergo get some frags just a few to up the fun, frags don't count as bioloading. The very light feeding to accompany them and the current animals and the five extra weeks all times out nice and safe to add a clownfish then in my experience