I started a thread on RC a while back about a 2/1/03 expiration dated batch that smelled bad. As it turns out, the batch did have some bacterial contamination and some people were returning their "foul smelling" product. I used mine with no ill effects. Here is what Dennis Tagrin said:
When we moved into our new facility we encountered a problem with bacteria growth in the final stage of our cultures for a few weeks until we found the cause. The bacteria left an odor in the culture and also caused some discoloration of the finished product. We did test this culture on rotifer cultures and they did fine. Since our cultures start from uncontaminated test tube cultures and we only encountered this problem at the final stage, ( cultures grown for production instead of inoculation) DT's is back to the way it should be in fact it's somewhat denser then before we moved. If anyone is not comfortable with using the product or feel dissatisfied they should be able to return it to the place of purchase. They can also contact DT's concerning their concerns or problems with returns. WE DO STAND BEHIND OUR PRODUCT. The only problem that has been brought to my attention, is that some people are uncomfortable with the odor , to be honest I can understand that.We have a sample of every batch we have produced for the last several months. The smelly stuff has a best if used date of Feb.1/03 Just to mention, Phytoplankton depending on the species will have some odor. Nannochloropsis oculata has only a slight odor that will be a bit stronger with very dense culture, dead phytoplankton smells bad and strong enough to knock you off your feet. If you have a problem with a return, please do not be hard on the dealer, we sell primarily to distributors and many dealers do not know how well we stand behind our product and will credit the distributor or dealer for returns , for just about any reason. If you have a problem contact us and we will deal with it.
Please contact us with any questions or concerns and if possible please provide a phone number if we want to call and discuss your issue.
Thank You,
Dennis Tagrin
President , DT's Plankton Farm
I'm not sure if you're having a similar problem, but people may want to check their 3/15 batches and see if they all smell nasty.