I have "seen" more frozen foods over the years than most here...
To the best of my knowledge, I have NEVER experienced frozen foods that have spoiled and become hazardous to the fish.
@Patio, different mysis come from different waters...some are FW and others are SW.
@Corallus
They might have come from here a long time ago.
But I got my original single from Green Marine way back many moons ago
I do still have a single at the moment.
ALL of the above feeds are used!
No one food has all nutritional ingredients and IF it did, and you were unable to acquire it.
Therefore I feed a mix of ALL of them
A cube of each plus a finger worth of each of the various flats into each f the squirt bottles
This does not include the various...
The bad pic is showing the white pvc pipe...
It’s the return from the uv’s to the section / chamber before the pumps chamber
ALL water flows from the left to the right
That anthelia or Xenia is smothering that long polyp toadstool!
I highly recommend you remove all of that “grey/brown” polyp Xenia/Anthelia
It has the potential of overgrowing EVERYTHING