Got myself a microscope...now what?

[alyee5]

Well, I am having a bout with brown stuff on my sandbed and some on rocks. I debated (hoped for diatoms) but with a 1 year old system/RODI with 0 TDS...I didn't think they were. Then I thought spirulina, but brown...so I bought chemiclean, but then before treating my tank I was thinking dino's after reading twillard's mega dino thread.

Since I am obviously not doing well macro algae/bacteria, I went ahead and bought an inexpensive microscope.

Here are my first images...what do y'all think I'm dealing with?

 

[Paullawr]

The larger oval shaped look like dinoflagellates. Do they move?

 

[alyee5]

No...they don't seem move under their own power...I'll take some more samples tonite to make sure...thx!

 

[Paullawr]

Then no. Unless dead of course. There diatoms in the sample so probably all good.

Dinos will wreck your tank with a snotty mess.