CyanoBacteria blanketing my sandbed

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Been at war with red slime algae the past month and half. My tank is  about 3 and half months old and its just coating my sandbed. I've tried using RED-X to rid myself of it but no luck. I've been vacuuming my sand bed  each time i do a water change but no luck, it just keeps coming back. I do weekly water changes and i feel like giving up. It makes my tank look so ugly. I haven't got a protein skimmer because my tank is only 68 litres and i need to order one small enough for my tank. I don't know what to do. Has anyone had a similar issue that can give me some advice?

ajm83

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Reply #1

can you post a pic of it under white (day) light?

what are your nitrate and phosphate readings?
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ExGerminate

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Reply #2

This is the best picture i could get without turning the flash on too high. My Nitrates are at 5 and as for the phosphates I haven't a kit to check.

Toper0

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Reply #3

To be honest I struggled for a couple of months with Cyno much worse than that and the advice my LFS gave was to order some Chemiclear from Ebay (It has to be imported from America so will take a couple of weeks and strictly speaking you shouldn't import due to its contents). This will clear it up but probably not get to the bottom of your actual problem which is why as AJM says test to understand.

ExGerminate

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Reply #4

That's only a few days worth. I cleaned the sand bed a few days ago and it just comes back to torment me. I'll have a little read into that. I've tried two different brands of these things that claim to treat cyanobacteria and none of em work. I don't want to continue to use them in fear of hurting my bio filtration. I just don't know how to get to the bottom of it.

ExGerminate

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Reply #5

Do high nitrate or phosphate levels cause cyano to grow then ?

mightyhatter

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Reply #6

Cyano is one of those things that most tanks will go through as it settles down. It is ugly, immensely frustrating and can ruin the tank if it isnt kept on top of. From my personal experience and all the reading on it i would say intensive tank.maintenamce is the best cure (clean filter socks/ meadia daily, syphon sand bed a regular water changes) - it takes a while bit if you are meticulous you should get the upper hand in a few weeks.

If you want to try chemicals i would recommend Vibrant - it can do a good job but be slightly wary if you have inverts

ajm83

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Reply #7

It does look like cyano but there is a possibility it could be dinos.  Can't tell 100% from the pic.  If you've got a microscope,  have a look at it under 400-1200 mag.

Otherwise you can try the test somebody posted on reef2reef:

https://www.reef2reef.com/threads/helpful-method-for-identifying-dinoflagellates.216508/

Unfortunately the treatment for cyano will do absolutely nothing for dinos, and vice versa. 🙂
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Animal

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Reply #8

Vibrant is supposed to be top dog for you’re problem as mentioned already , it does say it’s safe with inverts , if worried and do use it only use half dose at a time
Dave
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mightyhatter

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Reply #9

Vibrant is supposed to be top dog for you’re problem as mentioned already , it does say it’s safe with inverts , if worried and do use it only use half dose at a time
Dave

Yeah, it says it's safe but it took out my urchin and some CUC. When you search the problem it certainly isn't unknown but they don't put it in the literature!

Animal

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Reply #10

Other option is manually suck it out using a siphon
Dave
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