Phytoplankton culture water

[Thalia]

I have a bin of mixed salt water that's a bit old. I checked it today and it has 2ppm nitrite and 20 ppm nitrate, 0 ammonia. Clearly some sort of biofilm has occurred. It is heated and has a powerhead in it. Can I use this to culture phyto or does it have to be fresh Ro/salt mix?

 

[Mr. Mojo Rising]

It should be fresh rodi saltwater mix and all tools should be sterilized. its important to keep the culture free from any contaminants.

 

[IceNein]

It should be fresh rodi saltwater mix and all tools should be sterilized. its important to keep the culture free from any contaminants.

This was my thinking, but I wasn't really sure. The nitrates and nitrites aren't a problem, but something is living in the water, and who knows if that will be incompatible with the phyto culture. Maybe not, but it is definitely a risk.

 

[Thalia]

It should be fresh rodi saltwater mix and all tools should be sterilized. its important to keep the culture free from any contaminants.

Ok perfect, that's what I thought but thought I'd check before I mixed new water/salt.

 

[Thalia]

It should be fresh rodi saltwater mix and all tools should be sterilized. its important to keep the culture free from any contaminants.

Follow up question, could I use this water to culture pods? Or does that have to be fresh too?