If you are dosing with a doser I am assuming you are following his instructions on keeping it refrigerated. If not refrigerated it will spoil fairly quickly. Algae Barn says their OceanMagik live phyto will spoil in a few hours when kept at room temp. I am assuming other phyto blends will do the same. Refrigeration keeps the Phyto in hibernation allowing it to maintain its nutritional value. Some people that dose phyto with a doser will put it in a mini fridge and drill a small hole in the fridge for the dosing line. The one thing that confuses me is even the people that dose from a fridge still have a high possibility of dosing spoiled phyto due to the phyto that is still in the dosing line when the dosser stops running. Myself I manually dose 120ml every other day with an
8 Species Blend Phyto that is harvested by a member on this site that has been selling it on here for the last 2 years. It is great stuff and probably more dense and cheaper than anything you can purchase anywhere else IMO. I used it as part of my Dino eradication process. My pod population has totally exploded.
Below is a photo comparison of a reputable harvester of 6 Blend Phyto ( middle bottle ) and the 8 species blend phyto from the member on this site ( the two outside bottles ). Big difference in density as you can see.
The member on this site is
Eldredge if interested in reading about the phyto he harvests.