Red Sea weir overflow

esprits300

New member
Hello, I recently purchased a Red Sea max nano g2 XXL and set it up. I have the Red Sea nano mat, and a reef wave 25 in it. I have 1 question and 1 problem. so I have everything setup normal according to the manual, nothing fancy. everything has been running for about a month or so but the watch catch box behind the weir overflows constantly. not a lot, but it does flow over the whole length of it. the tank is an AIO and the weir has 2 outputs. one goes directly into the nano mat, the other dumps into the rear "sump".

I cannot for the life of me figure out why the box is overflowing. I have an ATO with auto sensor (Red Sea) on it and I know its level and correct. at first I thought the surface agitation was too much and pushing it over so I turned off and redirected my output heads. that made it better but didnt make it go away. turned off the reef wave as well. ive cleaned the weir and all equipment 3 times. when I put it back together and turn it on it takes anywhere from 10 minutes to 30 and it starts overflowing again. I thought the nano mat was dirty so ive used all new floss on it. nothing. no matter what I do, it just overflows. anyone heard of this? this is my first large tank, ive had a 33, 32 and a 20 prior but they never had this issue. ive contacted Red Sea but I get the feeling im going to get ignored.

which brings me to my question. so the second compartment dumps directly into the sump area. no filter no nothing. just spills into it. by design. I am beyond confused why they would design it this way. I have 2 return heads and both of them have sponges for debris and bubbles. they get dirty in a week. the one closer to the water just dumping in is way dirtier faster but I cannot imagine this is by design. again, I have no real experience so im learning this style but is this correct? I ask because the main reason im worried about the little bit of overflow is this is bypassing any filtration. but it might not matter if the other half of the weir is just dumping water into it with no filter.... either this was an oversight, im doing something wrong, or my understanding is wrong. if anyone can shed some light on this I would GREATLY appreciate it! thank you!
 
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