If the water is really clearing shortly after lights on my suspicion would be that oxygen, or lack of is causing the issue.
Had the same problem with a friends tank and he kept getting milky water a day or two after water changes, turns out he was overfilling the tank and reducing the amount of surface agitation from the filter, he only found this out by going on holida, water level dropped, more surface agitation, crystal clear tank.
Do you have decent surface agitation?
Would make sense that lights come on, plants produce oxygen, tank water clears.
BTW, just thinking out loud here.
And here is the next point i would like to describe.
Hazy cloudy water is as we know everyday and shortly photperiod starts it goes away.
Now I have done 2 Photos right now shortly after light is on. Photoperiod starts at 15:00.
I haven't mentioned in the main post but i have been observing my fishes during this time when I am challenging with water and situation like that. I can notice sometimes fishes are under surface catching oxygen.
The cover glass I have to protector fishes jump out from tank.
Jbl e702 is here since almost beggining and I was trying with spraybar, but then I just changed it for a normal standard knee outlet pipe.
I have really problem with fluval 107 pipes and especially outlet it is to deep under surface plus those pipes what I don't like it.
So what I want to do I am thinking to sell fluval, and just to buy another jbl e702 or little bigger e902. But e 902 I am not sure if is not too high to put it in my cabinet.
That small filter internal filter I put around 3weeks ago... it has got 250l/h. And set it to make air into the water. But even with aeration the water behaving still the same. Light on and crystalizing, Light off cloudy... and everyday like that...
Mentioning about fishes catching oxygen under surface, I was thinking about bacteria bloom and there is lack of oxygen, that is why I put that small internal filter for aeration... but it is like 4 weeks already and nothing changed....
Now the cover glass is not only to protector fishes from Jump out, but also protect evaporation of water from temp. I have in my living room around 19-20-21°C. In aquarium I set temp 23-24 to keep at least 22-23°C.
Even if this internal filter aerating water plus those two externals distributing, the water is still cloudy and after photperiod starts- crystalizing. About 1-2hr water is crystal.
During 4 weeks challenging with this problem I do 2-3 times a week tests on NH3, NO2, NO3... but all of them looks fine.
Nh3= 0
no2= 0
NO3 5-15 usually
Even I had aquariums many years ago, I didn't know a lot of about fertilising plants, but I have never had problem like this....
Thank you
Kind Regards
Peter
