75 gal suddenly cloudy?

And it was cloudy later on. Last night up until bedtime it was much more clear (though not AS clear as the other tanks) than it has been. This morning it's back to cloudy.

And it's not severely cloudy. It's not even "very" cloudy. It's just somewhat cloudy. And it looks much less clean and clear compared to my other two crystal clear tanks. The only difference in filtration or maintenance/care in this tank is that I have a canister filter instead of solely HOB filters. Could a canister cause cloudiness?
 
remember..only one of 3 tanks is involved...
 
I am still stocking the tank, so I have added fish (2 weeks ago the Julii cories were added). That is the only change. The plants all seem to be doing fairly well. I have one plant that doesn't look terribly healthy, but no dead plant matter floating around. The hornwort does no occasion discard a group of needles which whirl around the tank until they're either sucked into the filters or until I can net them out.

What I'm thinking at this point is that I'm going to dismantle the filters, rinse them in tank water and then put them back together and see what happens. If they sucked up enough plant matter and such, maybe they are causing the issue. It's the only thing I can think of at this point.

I need to go hunt the net on the best way to dismantle and clean the eheim, since that is not a venture I've yet embarked upon.

Any other suggestions are of course welcome. :)

~ Emily
 
Maybe a mini cycle after adding those other fish?
A bacterial bloom can be caused by a rise in nutrients like ammonia and nitrates. I think we found the culprit, this is right in the cycle where ammonia would rise, right after the nitrate rise.
 
Hmmm. I think Snoopy should handle this. I'll learn from his experience. I don't have any experience with white cloudy water, or green for that matter.
 
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