Are these Dinoflagellate, or something else?

[Toronto78]

Hi, please help me ID what this is, perhaps Dinoflagellate? Background: new tank setup, on day two of fishless cycle using DrTims. Started seeing one or two of these on day one, there are a few more today. Rock was cleaned, pressure washed, bleached for a week and the air/sun dried, and rinsed in RO water. Have a sand bottom (new sand that was rinsed).

 

[ScottB]

It is not dinos that is certain. If you are day 2 of cycling, there is no life in there yet beyond some bacteria.

Looks more like textile lint to me than something growing.

 

[Toronto78]

It is not dinos that is certain. If you are day 2 of cycling, there is no life in there yet beyond some bacteria.

Looks more like textile lint to me than something growing.

thanks, i initially thought that too but in places it seems to come out of the rock. Will clean it up and monitor.

 

[Dolphins18]

Yea most likely just some lint or something. You are going to see so many things over the next 3 months, I think its important not to get too hung up on everything as many things come and go. Most tanks I start with dry rock run into dinos at some point early on, but I promise it isn't the end of the world! Stay away from carbon dosing early on as that has been the cause of the "bad" dino outbreaks in my experience.