prymnesium parvum

[DPountney]

Just wanted to update everyone. It looks like my prymnesium problem is over. I can turn up blue lights and they are not showing up. I get a nice healthy green film on the glass, not brown.

I can not say for certain what exactly was the cure but I did do 2 things that were big changes to how I run the system. I started dosing Dr Tim's Waste away first and then I bottomed out my nitrates multiple times. After that it looks like they are not coming back. I now have nitrate on a dosing pump to keep right at 5ppm pegged and po4 under 0.06. So basically trying to go low nutrient system. And also as suspected my corals are taking off big time.

Be careful bottoming out nitrates. Thats an invitation to dinos. I think maybe the key is just keeping ultra low nutrients.

Just wanted to update everyone. It looks like my prymnesium problem is over. I can turn up blue lights and they are not showing up. I get a nice healthy green film on the glass, not brown.

I can not say for certain what exactly was the cure but I did do 2 things that were big changes to how I run the system. I started dosing Dr Tim's Waste away first and then I bottomed out my nitrates multiple times. After that it looks like they are not coming back. I now have nitrate on a dosing pump to keep right at 5ppm pegged and po4 under 0.06. So basically trying to go low nutrient system. And also as suspected my corals are taking off big time.

Be careful bottoming out nitrates. Thats an invitation to dinos. I think maybe the key is just keeping ultra low nutrients.

Hi. Can I ask if you are still free of Prynesium Parvum? I battled this in a reefer 425 for nearly a year and decided to just downgrade to a smaller tank and do a restart. New tank, New rockscape, new sand. Hydrogen peroxide dipped corals that I wanted to transfer over and freshwater dipped fish. No inverts were transferred and the only wet equipment I reused was my skimmer which was thoroughly bleached and cleaned. Anyway 3 weeks in and I have PP in the new tank. Can’t believe it’s even possible.

 

[Moe K]

Hi. Can I ask if you are still free of Prynesium Parvum? I battled this in a reefer 425 for nearly a year and decided to just downgrade to a smaller tank and do a restart. New tank, New rockscape, new sand. Hydrogen peroxide dipped corals that I wanted to transfer over and freshwater dipped fish. No inverts were transferred and the only wet equipment I reused was my skimmer which was thoroughly bleached and cleaned. Anyway 3 weeks in and I have PP in the new tank. Can’t believe it’s even possible.

My tank still appears to be clear of it but I did get some prorocentrum dinos bottoming out nitrate the way I did.

I have also replace some of my special grade sand with fiji pink. There seems to be a pattern with all this nuisance organisms and special grade sand. My other tank also got prymnesium for a few weeks but it just went away on its own but that tank has fine sand. I think this stuff is similar to cyano in that it is in all systems. So far so good.

 

[Paul24]

My tank still appears to be clear of it but I did get some prorocentrum dinos bottoming out nitrate the way I did.

I have also replace some of my special grade sand with fiji pink. There seems to be a pattern with all this nuisance organisms and special grade sand. My other tank also got prymnesium for a few weeks but it just went away on its own but that tank has fine sand. I think this stuff is similar to cyano in that it is in all systems. So far so good.

The UV sweeper didn't help? I have the special grade live sand and went with maricultured and aquacultured live rock. I sent you a DM before I found this thread with photos and vids. I saw someone in a fb group use the UV sweeper successfully for prymnesium parvum in conjunction with dosing a DIY coral snow and running UV in the display tank. However, I have a AIO with the IM UV running 24/7 the last two days. Skimmer and sponges picking up lots of brown nastiness. Fish and inverts are fine. Running the Rox carbon from BRS.

 

[Moe K]

The UV sweeper didn't help? I have the special grade live sand and went with maricultured and aquacultured live rock. I sent you a DM before I found this thread with photos and vids. I saw someone in a fb group use the UV sweeper successfully for prymnesium parvum in conjunction with dosing a DIY coral snow and running UV in the display tank. However, I have a AIO with the IM UV running 24/7 the last two days. Skimmer and sponges picking up lots of brown nastiness. Fish and inverts are fine. Running the Rox carbon from BRS.

Personally I never tested the UV Sweeper for prymnesium, only dinos. I usually only use the uv sweeper as a last resort as I test different things to see if I notice a reduction before annihilating them with the sweeper. It did seem to help a lot of others suffering from it though.

It is still unknown if they are breeding in the sand or in the water. I still get some outbreaks of it but nothing serious. If it gets very bad where it covers surfaces other than the glass, I will turn up my whites and lower my blues and in a matter of a day or 2 they will be noticeably less to a point where its not an issue. I will also lower my nitrates as said in another reply. I have also noticed that if I do not clean my glass (at least over a week) and just let it breed there, it looks like it will starve itself out and the surfaces in the display become very very clean. I only noticed that one time and will test it again when ever it blooms in the futre.

So basically I kind of live with it and its ok. I grow corals fine and the tank looks normal mostly. IMO restarting a tank is not a good option as its more likely to just come back. This stuff is probably everywhere, we are just identifying it better now.