Sea urchin randomly loses spines after a couple of days and seems dead

[SparksterRocketKnight]

Sea urchin loses spines, did some nitrate and ammonia tests and both come out fine. Royal Gramma and Black Molly seem fine in the tank. Recently bought seaweed supplement for the urchin too. Is there something else im not testing for thats killing my tank? I recently lost clownfish to stress too, and they are supposedly hardy fish, which doesnt make sense as my royal is completely fine. Yes, I am using tap and detoxifying as i pour in, yes i am measuring salt. I cannot afford a RO/DI filter rn

 

[littlefoxx]

Sea urchin loses spines, did some nitrate and ammonia tests and both come out fine. Royal Gramma and Black Molly seem fine in the tank. Recently bought seaweed supplement for the urchin too. Is there something else im not testing for thats killing my tank? I recently lost clownfish to stress too, and they are supposedly hardy fish, which doesnt make sense as my royal is completely fine. Yes, I am using tap and detoxifying as i pour in, yes i am measuring salt. I cannot afford a RO/DI filter rn

How are you detoxifying the tap water without an RODI?

 

[Mohawk Mafia]

Check with your LFS, they usually will sell RODI and pre mixed salt water for cheap. Might help

 

[I never finish anythi]

Tap water can be used , but I would not recommend it one bit . I think you should list all tank parameters so we can get a better understanding of what's going on . Maybe a tank picture to under white lights

 

[FUNGI]

Most likely it will die.....I dont want to sound like a dick, but

Aquatic Life RO Buddie 4-Stage Reverse Osmosis Deionization Water Filter System RO/DI Filtration Units for Aquarium, 50 GPD​

$69.99

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You will probably pay $70 in several months for that detoxifier you are using