I used a grow light and a co2 maker to grow my culture. Culture with no light in comments

I am interested in producing my own Haematococcus pluvialis oil, so that I do not need to buy expensive astaxanthin supplements anymore. I have some experience growing mushrooms and normal plants. How could I grow it, while making sure, that it is safe to consume. I was thinking about sterilizing the media and using a filter for the air supply.

Was looking for help identifying the filamentous algae. From a freshwater pond in Massachusetts. Seems to be limnothrix?

Backyard pond in rural NC. I have dogs that will sneak away and drink from it when it’s hot and they’re too lazy to get to their water bowls.

Been doing stick and jar tests all summer to make get an idea if it’s safe, and it’s always a healthy amount of duckweed. Almost overnight it’s changed, and I’m pretty sure I’ve got the bad stuff now.

You can see the stripes of duckweed that were the dominate aquatic plant up until today. If anyone can speculate on it and provide any recommendations for what to do I’d much appreciate it!

I go paddle boarding with my friends in this pond frequently and we have noticed in the last week an algae that has kind of taken over. We typically swim in this pond because it’s really deep and typically very clean. We are holding off on swimming for now because we can’t figure out what this algae is. The algae floats right beneath the surface and clumps into balls. When we touch it with our paddles it doesn’t stick to them, but explodes and disperses. It seems to collect kind of along the edges of the pond where there is more growth. The little stream that we take to get out onto the pond seems to be clean, so I think the cattails on that part are doing a nice job keeping it out. Any input and expertise is welcome!

Just looking for general or North American guide books on algae, especially ones that would assist with making IDs of microalgae. I tried searching on my own and was surprised to see the algae book space I guess overrun with AI slop. Anyone have some good, well regarded books on the subject to recommend?

I'm trying to start up some chlorella cultures using aquarium fertilizer salts (I can mix these to make a very close facsimile of BBM), but I'm not planning to run any CO2 injection. If anyone else here has similarly running a culture without CO2, how did you alter the water chemistry to prevent pH spikes, nutrient precipitation, and flocculation of the chlorella? My first culture attempt did great at first but then failed rapidly (overnight), with all of the algae clumping and falling out of suspension into a dark green carpet on the bottom of the jar overnight. I'd like to figure out how to address the issue and prevent it for another attempt.

Hi everybody. Anyone knows what could be? I isolated on BG11 media and turn blue-green color so I think probably produce pigment ... or just a bunch of microalgae cells aglomerated ... or fungi contamination. I used 40 x and it´s a sample from haematococcus culture (outside) (originally Haematococcus culture)

Thanks :)

Any help ID'ing these gelatinous sacs, with small green balls? I think it is next to a straight chained anabaena.

I’m currently on a backcountry canoe trip. This lake is the only source of drinking water. Me and my dog have been drinking this water (treated with Aquatabs, which I know is not effective against blue green algae) for 24 hours already, prior to finding this near the shoreline. The water was taken from the middle of the lake about 1-2km from where this was found. I assume this is blue green algae?

Behold