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Good morning, I’m new to Marine, my partner has had a tank for 4 years and I’ve kinda left him to it. Recently I’ve stuck my nose in as he was getting fed up with everything dying on him.

Anyway I’m doing research and helping him with this as he tends to only speak to the people in the fish shop etc.

I really need help with what the hell we are doing so wrong!!!?

We have a 140 gallon jewel tank with new led fluval lighting, live rock etc but we’re struggling with brown algie as well as most fish we have die suddenly without seeming ill or struggling. Most recently a butterfly and now a feather duster.

We do regular water changes and water checks are fine. I’ve now lost a little pink/yellow fish and I’m worried he’ll throw in the towel once he realises another has gone.

Is there anyone local who does this for a living that can come and help?

Thanks for reading,

Maria

ajm83

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Reply #1

Hi Maria,  bad luck - sounds like you've had a rough run!

Do you have coral in the tank, or just fish & inverts?

Can you tell me your results for the following tests and what kit you are using for each of them?

  • ammonia
  • nitrate
  • salinity
  • phosphate
  • alkalinity
  • pH

Can you get photos of the algae under daylight? It could be dinoflagellates, cyano, or some other things. They all need different treatment.

One final thing - what's your source of water for water changes and top ups?

Mariaefc

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Reply #2

Hi we get water from the shop normal salt but more recently natural salt water which is slightly more expensive.

We also have our water tested there so I can't give you the results I'm sorry as they usually say everything is fine.

I've took some photos it's not as bad as it usually is as I cleaned the sand a couple of days ago.

We just have 3 fish, 2 starfish, crabs and snails. The small corals were put in my nano tank and seem to be happier.

Last Edit: May 18, 2019 10:17:10 am by Mariaefc

HK_Fuey

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Reply #3

It looks like green hair algae (very common), and diatoms (also common). Your best best is several large water changes a few days apart. 50% or more. 50% will reduce nitrate and phosphate by half each time, so it take a few large ones to bring it right down.  The problem with test results is it only shows what's in the water. The algae IS feeding on something, and it's common that is sucks it up faster than you can measure it (that's why people grow cheato in the sump, or use algae reactors, or algae scrubbers).  Essentially, this is what's going on in your tank, but it's happening in the display, instead of in the sump. Reduce feeding, and lighting. Do big water changes to get rid of nutrients in the water column (from rotting food, fish poo, etc.), and you will get it under control.
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Mariaefc

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Reply #4

Well I’m delving further into the mechanics of the tank now and learned we didn’t have a skimmer. One is due for delivery tomorrow. Also a test kit so I can get clearer results.


Also we have a new light with Bluetooth and I’m unsure what settings to have the colours on? Do I need blue at night etc


I shall post a screenshot of what we have at the moment


Thank you again

Mariaefc

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Reply #5

Light

HK_Fuey

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Reply #6

You don't need blue at night. It all adds to the photo period for the algae. The skimmer will def help!
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HK_Fuey

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Reply #7

I'd reduce that down to 8 hours, you can always add later, once the algae is under control.
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Mariaefc

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Reply #8

Skimmer should be here today actually. I’ve reduced my lighting and we will do 2 big water changes this weekend. Thanks for all your help it’s appreciated.


Maria

Mariaefc

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Reply #9

Update green and brown algae seems to have disappeared 👍

HK_Fuey

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Reply #10

Looking great now  *D
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ajm83

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Reply #11

Nice, that's look good now!

Plans for more coral/fish?

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