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- Jun 1, 2026
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I set up a 16 gallon biocube back in the beginning of August. I seeded it with live rock from the established tank, and about 4 weeks after starting the cycle, it was ready.
We bought a blue clown goby and 2 hermits, drip acclimated them and added them. Everything was good for 3 weeks, hermits and the goby were happy, were eating and seemed happy. One day the goby disappeared and I never did find its body. Tested the parameters when I noticed he was missing and there was an ammonia spike, so I removed the hermits.
I added a bottle of dr tims bacteria, and waited 3 more weeks. Added some ammonia and tested, it was processed into nitrates within 24 hours. On 10/25 I tested all my parameters and were as followed: temp 79, salinity: 1.025, ammonia:0, nitrites:0, nitrates between 2-3. I did a water change (little less than 50%), then we bought a clown and 2 new hermits. Drip acclimated and added to the tank. Clown seemed happy and wasn't showing signs of stress other than a little bit of glass pacing. However by the next morning he was dead.
Check my parameters again and nothing had changed. Hermits were still doing fine and weren't showing signs of stress. I wrote it off as the clown just not surviving the journey, I know it can happen.
Yeaterday I did another water change, tested parameters, they were still about the same as the week prior. I drip acclimated a new clown and added him to the tank. He seemed fine at first, but then I noticed he was breathing heavily. I have an ammonia badge of my tank and it was reading 0, and my ammonia test also read zero. It looked like he was struggling to get oxygen so I added another power head to agitate the surface and I opened a window. The return on the tank is already pointed at the surface so there is a fair bit of surface agitation.
The water was slightly cloudy, but I had done a water change earlier and stirred some sand up, but I turned on my uv light just in case it was the start of a bacteria bloom. The clown did appear to be doing a bit better by the time I went to bed, but he was gone by morning. I didn't have time to test parameters but my ammonia badge was still showing 0.
I really am at a bit of a loss here, I have had my other tank running since March of this year without issue, I have an ro/di setup that I get my water from and I check the tds of every batch. What could possibly be going on?
We bought a blue clown goby and 2 hermits, drip acclimated them and added them. Everything was good for 3 weeks, hermits and the goby were happy, were eating and seemed happy. One day the goby disappeared and I never did find its body. Tested the parameters when I noticed he was missing and there was an ammonia spike, so I removed the hermits.
I added a bottle of dr tims bacteria, and waited 3 more weeks. Added some ammonia and tested, it was processed into nitrates within 24 hours. On 10/25 I tested all my parameters and were as followed: temp 79, salinity: 1.025, ammonia:0, nitrites:0, nitrates between 2-3. I did a water change (little less than 50%), then we bought a clown and 2 new hermits. Drip acclimated and added to the tank. Clown seemed happy and wasn't showing signs of stress other than a little bit of glass pacing. However by the next morning he was dead.
Check my parameters again and nothing had changed. Hermits were still doing fine and weren't showing signs of stress. I wrote it off as the clown just not surviving the journey, I know it can happen.
Yeaterday I did another water change, tested parameters, they were still about the same as the week prior. I drip acclimated a new clown and added him to the tank. He seemed fine at first, but then I noticed he was breathing heavily. I have an ammonia badge of my tank and it was reading 0, and my ammonia test also read zero. It looked like he was struggling to get oxygen so I added another power head to agitate the surface and I opened a window. The return on the tank is already pointed at the surface so there is a fair bit of surface agitation.
The water was slightly cloudy, but I had done a water change earlier and stirred some sand up, but I turned on my uv light just in case it was the start of a bacteria bloom. The clown did appear to be doing a bit better by the time I went to bed, but he was gone by morning. I didn't have time to test parameters but my ammonia badge was still showing 0.
I really am at a bit of a loss here, I have had my other tank running since March of this year without issue, I have an ro/di setup that I get my water from and I check the tds of every batch. What could possibly be going on?
