I had my new Neptune ATK fail after a couple months. The sensors would cause the ATK to not fill, then completely fill and the end result....300g SPS dominant with a lot of wipe out due to salinity fluctuations. So in short, I totally understand the fear of a mechanical or optical float.

+1https://babang.xyz/assets/10/o.png

The original gen ATK (and DDR) sensors are junk, to the point they put out a revision of both the optical sensors, and the PMUP. If under warranty the gen1 they would replace the sensors, else they wanted $30 US per, plus shipping, for the gen2 sensors direct from Neptune.

all good

float switches in general .slow timered pumps just make me feel safer than a pump always on with sensor cut offs.

Ive never used the ATK, I had set my top off pump to stop before I left for work so If i could hear it walking out the door Id know there was a problem and on weekends I'm usually leaving to go diving about the same time.
Im a creature of habit so its very hard for me to wrap my head around changing when it has worked flawlessly for me.

the gears stripped in it finally but I got my moneys worth it didnt owe me anything.

no i haven't. Honestly I got so ****ed off just trying to update it, I'd rather just pay someone to do it for me.

SO Bblinks got me sorted out! thanks so much!!!!

pump 1 just doesn't seem to work. switched settings to pump 2 and runs like a charm.

gonna fire Neptune an email and see what they say. manual button works just fine so I dunno. I hate computers.