Hyposalinity and tang aggression

[4FordFamily]

I faintly remember this happening about 8 years ago or more last time I used hyposalinity-

My tangs were nastier than ever to each other and new additions than I've ever seen. No real damage but I've never seen chasing and harassing on this scale. I have two 180 gallon tanks I am doing hypo on now due to a ridiculously strong strain of ich, and my three tangs in my angel tank are also more aggressive than usual - ever since I dropped the salinity.

I know it's a small sample size but I have a lot of tang experience especially with multiple tangs. It's very odd to me. The same thing happened when I dropped it over two days from my qt prior to going in to the 180 that was also hypo. I got them used to it prior. My carribean blue and Achilles which had been existing mostly in harmony got in to it a bit.

After a few days things have settled to maybe normal +20% aggression although everyone gets along it seems like everyone is very irritable.

I guess it makes sense but I was curious if anyone else had experienced this?

 

[143MPCo]

Curious, what did you drop the salinity down to in the display tank, also how long did you hold it at that level?

@3FordFamily

 

[4FordFamily]

Curious, what did you drop the salinity down to in the display tank, also how long did you hold it at that level?

@3FordFamily

1.007. The aggression "began" at 1.012. It seems to have neutralized a bit but my PBT is still absolutely terrible in my angel tank. Both 180 are currently at 1.070 and have been now for two or three weeks I lost count.. Lol

 

[143MPCo]

assuming the drop was of SG was slow, was the progression in aggression noticeable at a particular set point during the lowering or was it at the endpoint of 1.007?


EDITED: nevermind you answered that question, how long are you planing on maintaining the SG level?