Another dinoflagellate battle…

ahiggins

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I’ve been reefing for close to 8 years now and I’ve had my share of ups and downs like we all have lol
I’ve noticed the past few months dinoflagellate have come back with a vengeance-due to me messing with the nutrient level. Definitely my fault lol

background:
I had a 10 gallon rock nem tank that I transferred to a 30 gal tank. Rocks from the 10 came over plus about as much in new dry rock. The 10 went through its Dino phase early on in the journey and I beat it back eventually with UV and increasing N and P. Well, the new rocks plus not having much in the way of biodiversity, plus my idiot move of trying chaeto all resulted in the Dino’s surging out of control in the 30. It’s been about a year with the new 30 and I’ve been trying everything to get the Dino’s back under control. After fiddling with figuring out what they were, I have osteoporosis identified via microscope. I’ve never had this much trouble “fixing” an issue. It’s so stubborn and it seems that it’s happening to an increasing number of people.

what I’ve tried: I usually gave each one about 2-3 weeks before moving onto another method.
1) Increasing N and P (still dosing even though it was the first thing I tried, I’ve kept it above zero)
2) added UV to the filtering process (kept on until I tried bacteria method below) blowing off the Dino’s nightly
3) turned temp up to 79 (usually sits around 76-77-after about 3 weeks, I didn’t notice a difference so I turned it back down) and decreases the photoperiod of lights.
4) bacteria blends and phyto/pods (dr Tim’s, a new one from the lfs, white and blue label, plus pods and phyto)
5) added a 4th fish to increase nutrients naturally instead of dosing plus adding a conch since I had the room and they look cool
6) the dirty tank method with UV-current phase. Letting the fish do their thing and feeding a ton. I have a decent bit of algae on the majority of the rocks and the conch usually eats it when it gets to about an inch long. I have filter pads that catch what I blow off and then it goes to UV. after 2 weeks with this I’m starting to feel defeated. I’ve never spent so much time and effort dealing with a singular issue.

tonight: I’m grabbing some established (~10 yr) rubble and some filter pads from a friends tank tonight and I’ll toss it in the sump and turn off UV again. I haven’t done a water change in probably a month or 45 days. I’ve never wanted to go nuclear and peroxide the tank, I feel like that goes against everything I’m working toward to INcrease biodiversity. Someone tell me I’m not crazy lol I’ve done everything I can think of and it not making a dent in the dinos.
 
What types of corals do you have?

If lps/softies you can try lowering your lighting percentages and see where that takes you. I have had some luck doing that recently among other things that was very specific to my tank.
 
It’s a rock nem tank, I tried that with the lower photo period (shortened time and cut back on whites) but that didn’t work. I’m literally out of ideas at this point.
I found a guy selling some coral from a 10 year old tank and he gave me some “sump goop” lol so I’m hoping that helps a bit.
A bigger problem is that nothing goes into this tank. Ever. I only bring in rock nems (no water) and a handful of stomatella or brittle stars when I see them roaming the lfs. So I never get the plethora of bacteria from lots of tanks.
 
I noticed you tried increasing your temp, but not as high as recommended in this article (83F).

I haven’t tried this method, but I’ve been interested to see more data points to understand if this works consistently.

 
With a rock nem tank i would maybe say take your whites to 0% for a week or more. Nems should do fine with that and might be a cool change of how the tank looks. Sorry if you tried that already.

@SFREEF3R I did the temp thing and I did notice some difference but nothing long term.
 
Thanks for the input!
I was a little scared to turn the temp up that high. Wonder how it affects rock nems. I’ve taken it as high as 80 (accidentally lol) and didn’t notice an issue.
I also didn’t try 0% white-I usually run 30% so I took it down to 10% but not 0. That could be my next trial.
 
Don’t mess around with temp, it doesn’t reliably work.

Here’s what I would do: Keep lights on for 6 hours a day max. Run the UV with slow flow. Be more consistent with feeding (don’t overfeed especially with amino acids and coral foods because dinos consume that).

Do water changes on a consistent bases, siphon sandbed.

Keep things consistent and it will go away with time. Dinos flourish with instability.
 
Don’t mess around with temp, it doesn’t reliably work.

Here’s what I would do: Keep lights on for 6 hours a day max. Run the UV with slow flow. Be more consistent with feeding (don’t overfeed especially with amino acids and coral foods because dinos consume that).

Do water changes on a consistent bases, siphon sandbed.

Keep things consistent and it will go away with time. Dinos flourish with instability.
Ill try that as my next thing if the seeding doesnt work :) thanks for the advice
 

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