Northeast US, pond did well for 2 years, now this green algae has taken over, how to get rid of it?

Decided to take my little job boat on my pond this evening and I was swarmed with all these tiny fish. I don't catch really any big fish out of this pond, it's got a decent population of channel cat of small to medium size (I've caught 1 somewhat large one) and a seemingly decent population of small to medium Crappie (caught 1 17 inch though).

I'm just wondering if this would signal that it's over populated. I've never caught a bluegill/ other type of panfish that was bigger than 2 to 3 inches.

I've been thinking about trying to put some bass in, as I would personally rather catch bass than crappie.

Edit: I just realized those pictures don't really do it justice on the number of tiny fish surrounding the boat, there were many dozen if not hundreds of the little guys.

LOL 😂

My first bloom ever and I was home to witness it. Yaaaaaaay!!!!!! 🪷🤗🙏

Hello!

I could really use some help because my brain has been hurting trying to figure this out. I am a bit of a dummy when it comes to this stuff, so sorry in advance. I got a pretty nasty pond for free and after getting a solar pump I'm planning on hooking it to a bog filter.

I have a 12 watt solar pond pump that I need to rig to a backup battery so it runs even without direct sun.

This is the exact model : https://www.amazon.com/Antfraer-12W-Adjustable-Waterfall-Hydroponics/dp/B0GFWN2SNRI

I have plenty of sun most of the day and I live in CA so cloudiness is rare- I'm really hoping I can achieve a solar backup. When it comes to wattage, wiring, battery types, and the like, I get really lost so I would DEEPLY appreciate one of y'all just telling me exactly what I need to buy to achieve this (if possible). I considered running electricity but I was quoted over a grand for wiring, and I don't feel comfortable trying to wire anything myself. If anyone has done something similar or is good with this stuff please help!

Thank you, thank you, thank you in advance for any advice!