Multifasciatus Flashing- Ich?

Oof, I purchased 6 multies from the LFS yesterday evening. I've been seeing one of the multies flash occassionally. It's definitely not constant but I've seen it do it at least 4 times in the past 18 hours (I was asleep during the night which is part of those 18 hours so the number could be higher)
Flashing has been an issue in my other tank for a long time... in my other tank, it had ich a few months ago and I treated with ich x and the white spots went away, along with the flashing and the flashing did not occur for several months but in that tank I have been noticing the flashing coming back, usually happens after a water change, and even then not every fish does it. There was a period where I did not do a WC for 2 months (parameters were surprisingly fine, less than 20 ppm nitrates, then again not many fish in there) and I did not witness flashing at all. Did a WC and the day after I notice it in my Male krib.
Should I treat the new tank (tanganyikan) with ich x as well?

 

Flashing could be ich, or some other parasite, or caused by something with the water. I wouldn't treat for ich til i actually see it.

 

Cichlids are known for flashing. And it’s not caused by ich most of the time (make sure it’s not ick though). They will flash when the water parameters change, or if there is a bit of ammonia, or too much nitrates, etc.

Flashing after a water change is often seen, because the temperature, PH, GH and KH will always vary a little bit.

I’ve never had multifasciatus, but I suppose they’re just like other cichlids on that aspect.

Mine always flash after a water change. I do 50% and I just decided I’m going to try 33% to see if they like it more.

 

Thanks for the replies! I have been seeing it happen a lot more common now with the fish. The color of the fish makes it harder to spot any ich spots.

 

I recently started keeping a community of multis as well and they are having similar issues, I was previously using municipal tap water treated to do water changes but since switched to ph matching rodi to make sure there aren’t any heavy metals. It is concerning to watch... but they did recently spawn despite all of this so I guess they’re ok? I’m not too sure