Mine definitely had the stringyness that yours has right there too. Just doesn’t show in the only pic I have. There are several strains though, so I’m sure there are differences.
Though I'd post a quick update. I was successful in stopping the dinos! Phosphates are above 0 and no dinos in sight for a few days. Big thanks to @mjw011689
I'm very glad I was able to avoid an outbreak. The UV/non zero phosphates in tandem with the reduced lighting was the key.