Excellent quality phyto, very dark and quick shipping
Excellent mix of diatoms that will replicate in your system and one of the most important tools you can use when fighting Dino’s - I actually dose this into newer set ups as it gets diatoms growing on the surfaces which in term out compete the other nuisance algae’s which are so much harder to deal with - then once a system is matured / stable you can back off adding silica and let the diatoms consume all the silica in the system - then they will quickly fade away - corals and filter feeders love this stone as well