emergency help please

[Weyou]

Dry rock or live rock?
Fishless cycle with ammonia, or did you use a food source (table shrimp, fish food)? Or did you cycle with a fish?
Is the Blenny the only fish ever to go into the tank? (I know it is the only one now, but did you have any die on you previously?)

Assuming multiple test kits have shown that sky high Nitrate, besides using some heavy water changes to knock the level down you need to figure out what the root cause was for this. That will in part determine what your courses of action to take after diluting the current level. Get yourself a large clean garbage can (45 gallons or greater) so that you can make some sizable batches of new seawater.

i got this in my tank

 

[Weyou]

i used dead shrimp and also dosing ammonia in the cycle process
I have 3 fish dead

 

[vetteguy53081]

Add Chemipure Elite which will keep Phos and nitrate in check

 

[TriggersAmuck]

That live rock looks like it was probably very clean when added to your tank, so there probably was not significant die off from the rock. Now if any of those 3 deceased fish went missing in the tank (rather than you netting and removing them) along with a long period of ammonia dosing, I can start to see the Nitrates getting higher like you are measuring. @vetteguy53081 is right, you can also use chemical means to help bring down the nitrate, but it would be best to use a combination of methods.....large water changes, some chemipure, and then a more permanent solution, either using carbon dosing (building up gradually) or adding some macro algae to a refugium.

The other thing we haven't mentioned yet is making sure that feeding is very light, like potentially every other day, especially while there is only one fish in the tank.

 

[Weyou]

My tank is 6-7 months; after 4 months, I stop checking, but I admit it was a mistake.
There was no No2 in my tank before.
No heavy feeding, no dead fish decade in my tank, no live rocks, so what can happen? Please don't neglect this thread
it's super important to me to get serious help with my tank

 

[Weyou]

Up, sorry it is emergancy....

 

[jccaclimber]

1. Please give us a picture of the system, prefers without looking super blue.
2. Do you have sand? If so, if you pick up a handful and drop it back in does the water cloud? Do you siphon it when you change water?

 

[A sea K]

i used dead shrimp and also dosing ammonia in the cycle process
I have 3 fish dead

Cycling the tank not only with dead shrimp but dosing ammonia also will certainly leave you with elevated nitrate in a newly cycled system.
I'm onboard with doing some large water changes.

 

[SMSREEF]

I would do a 50 gallon water change, being careful to match the exact salinity in your tank, exact temp, and similar Ph using the same salt mix that you used initially.

you will have this solved pretty quick and be able to move on.

 

[Weyou]

i won't do any water change except my 10% water change per week.
i do have sand that I put in 3 months before I first put him in my tank.
i do a 4-month cycle, and all of this time, check my parameters ammonia, no2, and no3.
i will do a video and picture of my tank, but I don't think it will help
i don't have any of algae outbreak like hair, green, cyano, or dino in my tank

 

[jccaclimber]

i won't do any water change except my 10% water change per week.

You should reconsider.

i do have sand that I put in 3 months before I first put him in my tank.

Does not answer the question about the drop test.

i do a 4-month cycle, and all of this time, check my parameters ammonia, no2, and no3.
i will do a video and picture of my tank, but I don't think it will help
i don't have any of algae outbreak like hair, green, cyano, or dino in my tank

Sometimes we see things we did not think to ask for.

 

[Weyou]

 

[Weyou]

my tank 20.10.20

 

[Weyou]

UP

 

[JSR]

Whats the emergency?

 

[Weyou]

No2 in my tank, that wasn't before

 

[jccaclimber]

1. The link in post #32 is not working.
2. Question about sand drop test still open.
3. It has been nearly a week, are you testing nitrite daily? Is the result still 2 PPM?
4. What does your source water test at?

I'm leaning towards some sort of testing error on the nitrate, or the fact that small water changes tend to produce small results (if the nitrate is real).
The nitrite I don't have a good answer for yet.
Does the tank register ammonia?

 

[Weyou]

i know, but the link in post 33 work?

 

[Weyou]

1.assays, my reverse water is clean because I test it with test kits
2.I test again immediately and post the results again
3.but my feeling go with the UV sterilizer that I add recently

 

[jccaclimber]

i know, but the link in post 33 work?

Yes.

1.assays, my reverse water is clean because I test it with test kits
2.I test again immediately and post the results again
3.but my feeling go with the UV sterilizer that I add recently

I could see a mass bacterial bloom from UV as causing a nitrite spike, but expect it would vanish within days.
I don’t see that causing a nitrate issue unless it’s a test error.