Dirty Sand Bed Driving Me Crazy!

[Kial]

Hey!

Im struggling to keep a clean sand bed, no matter what i do it gets dirty again within 12 hours. Tank is around 2 years old now and ive not had the issue as bad as this before.
Ive tried siphoning but the problem still doesnt clear. The sand seems to go a brownish colour on the top layer. I use rodi water and its saying tds is 1.

Tank is 400L, 4ft and has 2x hyrdra 26hd running on it.

Have a GFO reactor running and a reef octo skimmer.

Any ideas what i could try?

cheers
Kial

 

[TheOne]

A couple of diamond goby's and a tiger sand conch keep mine pristine.

 

[Hamada]

Siphon out a small amount of sand than replace with new sand, repeat until all of your old sand is replaced with new sand.
NOTE: Do this very slowly over a course of a month or 2.
Also do you should have sand shifting animals, snails,gobys,shrimp etc..

 

[Duffer]

If your tds is 1, I would look into changing your di resin

 

[naterealbig]

Remove sand.

 

[Arricefe]

+1 on Tiger Conch and Goby.

 

[TheOne]

+1 on Tiger Conch and Goby.

There like a roomba for your house. I use to stir my sand and even bought a gravel vac and used it for awhile. Since adding the goby's and conch I haven't touched my sand since. Also have nassarious snails, Mexican turbos, emerald crabs and trochus snails. They call them CLEAN UP crews for a reason.

 

[Thespammailaccount]

Your sand may have become what they call a nutrient sink given two years

 

[VA5]

Sounds like cyano to me. Is it mostly on the front panes facing light?
If so you can buy various treatments and decrease indirect light
I have had a recurring cyano problem after move to a new tank. Despite what everyone claims as underlying causes my nitrates snd phosphates are very low. My LFS owner has had similar issues with tanks receiving direct sunlight too

 

[IKD]

Did you confirm it’s not dinoflagellates?

 

[New&no clue]

Agree with the goby, my sand looks awesome. However do you have corals on your sand bed? If so I wouldn’t recommend a goby as they will move/bury/bother most corals

 

[SDK]

I would check for Dino’s as well. You are running a GFO reactor, but what is your PO4 testing at?

NO3 levels and a picture would also be greatly helpful...

 

[Kial]

I used to have a goby and he would destroy any corals on the sand bed. I do have some nassarius snails, trochus, and stromb. Also sea cucumber which cleans it but only in patches and is SLOW.
I dont believe its cyano as I've had this before also dont think its dyno.

 

[Timfish]

Try siphoning off the taop layer of sand, rinse a few times in tap water, drain, then pour in a bottle of H2O2 and let it set a day or so. rinse again once or twice and add it back to your system.