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05/07/2019, 06:03 PM | #1 |
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Stringy Algae after switch from MH to LED
Hi all.
I’ve been fighting a red stringy algae in my 29 gal tank since I switched from halides to LED. I’m using the black box Amazon LED - on about 30% power. I had it higher but dialed back as the algae set in. I’ve done many water changes. I run a Tunze skimmer and media filter with GFO and carbon and filter floss. I figured maybe it was a learning curve for the tank but I’m several months in and it won’t go away. I’ve added cleanup crews and tried to increase flow. I know Cyano - it isn’t really that like a blanket. It is more of a stringy algae that grows upwards toward light on the sand and rocks. Turning the lights off - stops growth completely. Tank is about 12 years old. 2 clowns, a goby, a shrimp and some cleanup critters. Any advice is appreciated. Thanks, GV |
05/07/2019, 06:12 PM | #2 |
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05/08/2019, 06:25 AM | #3 |
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Looks like dinoflagellates. A change in lighting spectrum can bring them on. I used to get them under 10K MH but they would slowly go away under 14K MH. They aren't easy to eradicate. Lighting spectrum change, siphoning them out, and water changes worked for me.
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05/08/2019, 11:16 AM | #4 |
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Thank you for the reply. I’ll stay on course and keep up the battle. Wonder if I should dial up the blue in the LEDs? I used to run 14k MH - 150W.
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05/08/2019, 04:17 PM | #5 |
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Well - I read a bunch of stuff on Dinos today. Again, I appreciate the diagnosis and I certainly concur that is what it is. So here is my plan. This tank is sumpless so I have some limited options.
I'd love any input on my plan - good / bad. At least it isn't Bryopsis again eh? Thanks, GV |
05/09/2019, 07:39 PM | #6 |
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Your first five steps look good. I don't think the last three are necessary. I wouldn't go with chaeto until after the dinos go away. I had chaeto at the same time and the dinos loved coating it.
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05/09/2019, 09:57 PM | #7 |
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Location: Olney, MD, USA
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I highly recommend the UV light option. I have a 55 corner tank and, like you, am sumpless. I had been battling dino's for months. Lights out and they would disappear only to come back in a short while. I read some reports about positive effects of UV light on eradicating dino's and decided to try it. A month ago I purchased an Aquatop PF40-UV which is a small hang on the back filter with a 7 watt UV light. Within 24 hours I could see a change for the better. 3 days later my sand bed looked like it had a light diatom coating. I vacuumed the sand while doing a water change and it has remained white ever since. Dino's have not reappeared. Water is crystal clear and skimmer produces more output.
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05/10/2019, 08:46 AM | #8 |
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Dinos are tricky because there are many different strains, with widely varying treatments. You probably have seen that in your research.
What worked for me was UV, manual removal-not water changes, competition for nutrients, using Ulva (better than chaeto), and consumers, employing lots of reproducing snails (no hermits!) and lots of pods. After a month or two, when you see that you have it on the ropes, do a very thorough, large manual removal, combined with a three day blackout. Wrap the tank so no light gets in. Then do a good vacuum/water change to remove the dead stuff. Add a bubbler during the blackout to keep oxygen levels from dropping too much. There is much disagreement in what fuels their growth. I solved that issue by going with the knowledge that 'you are what you eat'. Manual removal removes it AND what it eats, so you don't have to figure out what it's eating. If you need to vacuum to remove it, you can tie a filter sock or similar to the end of the hose and put the removed water back in. What do you think is the most concentrated source of it's food, the water or the dinos themselves? This worked for me. You'll likely end up with your own variation. I did a lot of research and made a list of things that made sense to me and formulated my plan from there. I hope this helps. Good luck!
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As many naturalists and environmentalists have suggested, we should set aside our arrogance, our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey Current Tank Info: 180g Seagrass Sandbar Lagoon, START DATE November 28, 2018 |
05/10/2019, 06:15 PM | #9 | |
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05/10/2019, 06:19 PM | #10 | |
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05/10/2019, 06:22 PM | #11 | |
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05/10/2019, 08:15 PM | #12 | |
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05/11/2019, 04:32 PM | #13 |
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Thanks Potsy
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05/12/2019, 09:59 PM | #14 |
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You worry too much. It doesn't look all that bad to me. Just a simple transition period. I'd get one or two turbo snails and that tank will be fine. I might substitute a small urchin for the turbo snails, but it may eat that pretty purple coraline algae.
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05/20/2019, 07:11 PM | #15 |
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Update - added carbon. Stopped water changes. Added UV sterilizer. Siphoned water into filter sock to remove debris and put water back in. Added air tubes to my maxi jets and increased air significantly. Added Chaeto. Really think UV was the kicker. My tank used to look like a snow globe when I blew off the rocks. Almost gone!
https://www.dropbox.com/s/c46nq0bda9..._0801.JPG?dl=0 Thanks for all of the help and advice. GV |
05/21/2019, 07:54 AM | #16 |
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That's great to hear! Good job!
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As many naturalists and environmentalists have suggested, we should set aside our arrogance, our desire to conquer and control everything, and walk hand in hand with Mother Nature. -Walter Adey Current Tank Info: 180g Seagrass Sandbar Lagoon, START DATE November 28, 2018 |
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