203 Gallon Fountain Converted Into Pond- A Little Guidance?

I think that we may already have guppy fry! I've only seen maybe three or four, so I'm assuming the goldfish and betta ate the others (thank god) but they're maybe three millimeters long and solid brown. I don't think they're goldfish fry or minnows, but then again my quick google search didn't bring up any fry that look solid brown.

 

My guppies had babies and they turned black within a few days, but I can also see goldfish fry being brown. Sounds like they're doing well if they're birthing!! Good luck!