I fought dinos at around 4 months in my 14 gallon. I threw a bunch of things at the wall and beat them pretty quickly, maybe 2-3 weeks of work. I’ll list my key takeaways but can’t point to any one thing as a silver bullet.
1. Having a microscope is helpful for this hobby because it helps the community diagnose what kind of dinos you have. I had SCA.
2. I have an IM tank and bought the IM UV desktop gadget. I put this in the first chamber of the overflow, covered with filter floss, which I changed every morning. Kept this going for a month after I stopped seeing obvious dinos with less and less diligence on the floss as time went on, then back to filter socks.
3. Dosed Microbacter Clean and used Life Source weekly. Now I dose Microbacter 7 weekly as part of regular maintenance and Life Source monthly.
4. Did minimal water changes to keep nutrients up but still changed some water for stability.
5. Dosed SpongeExcel, got plenty of algae.
6. Majorly ramped up my clean up crew. I had 4 blue leg hermits, I added 5 more. I added the smallest turbo snail I could find and the smallest tiger conch I could get. Already had 4 trochus snails (which have spawned so my tank is even more stocked now!) and 2 nassarius snails. I plan to swap the turbo snail for another baby at my LFS if/when it gets too big for the tank. I absolutely love the tiger conch, it has made a night and day difference to the upper sand bed.
7. I did not do a blackout or change my light schedule at all. I did all the above and in a few days there was a noticeable change. In a few weeks it was gone.
8. My GSP also closed early on during the dino bloom. I did a hydrogen peroxide dip and it came back after a few days.
Other notes:
-You’re not going to see the clean up crew eat the dinos directly, but I think all the added activity on the rocks and sand helps to keep the dinos in the water where the UV picks them off. Meanwhile other bacteria you’ve added and the algae growing from the silica can build up on surfaces.
-I feed twice a day. I run rowaphos, carbon, and a bubble magus skimmer. Nitrates in the 20s and I work to keep phos below .2. I’d like phos lower to be closer to the consensus, but everything seems to be healthy at these levels so I don’t panic.
My tank is 10 months old and I’m no expert, but it is all getting easier. Good luck, you can beat dinos!