ID questions

[Sanderguy777]

First, what are these things? I found them both in the water from a fish tank and I think the photos were taken at 100x for both hair algae ones (with the blob with the saw "mouth") and the zoomed out "bug" (tardigrade?), and 400x for the zoomed in one.
Second, where do I look for ID info outside of this forum (so I can get faster answers without having to bother you all)?
Third, what do I do to be able to post photos that don't look like they came out of minecraft? (i have a 24MP camera, so these are really sad to look at LOL)

20220226_SNY7000.jpg (81.38 KiB) Viewed 1352 times

20220226_SNY6998.jpg (90.69 KiB) Viewed 1352 times

20220210_SNY6590.jpg (110.22 KiB) Viewed 1352 times

20220210_SNY6583.jpg (82.88 KiB) Viewed 1352 times

[Bruce Taylor]

First one is a rotifer. Second one is a mite.

[ORSTAN]

The first 2 photos show a bdelloid rotifer, the creature in the other photos looks like a dust mite that fell in the water.

[Sanderguy777]

Thanks!