critique my DIY automatic water change system

walkerbrody

lost ball in high weeds
This is a terrible paint picture of my diy automatic water change system.

I have a 10 gallon area in my sump that is slightly higher than my skimmer section. During normal opperation a small pump circulates roughly 100gph through the water change section.
I have a 7 day timer than turns on a 12v power supply.
During non-water change conditions the normaly closed section of a dpdt relay powers a second relay. The normaly closed circuit of the second relay turns off the 100gph recirculation pump for the water change section of the sump. When the float switch is in a low or open-circuit position the relay goes to the open circuit section. This section powers the new saltwater fill pump until the float switch closes the circut.

When the 7 day timer turns on the 12 volt power supply (for 5 minutes per week) The first relay turns off the second relay (the one that controls either the recirculation or the new saltwater fill pump), and turns on the drain pump. The drain pump empties the water change area of my sump at roughly 1.7 gallons per minute.
All recirculating and refilling lines are above the water level to prevent syphon. The drain line is above the water level also to prevent syphon.

Water pipes are shown in black (so is the tank baffles and pumps, sorry)
and the electrical system is in red. I know my drawing is terrible, but the system seems to work well.

I would appriciate any feedback if you can understand my mess lol. Thank you

Im sure this is most likely unnessessary, but I really enjoy making my system as automatic as possible.

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It looks good and if it works for you then all is well.

However, I would personally want to control this myself and somewhat automate the top-off. That is my goal when I get my new rig.

Can you take some pics of the actual thing?
 
Ill work on a picture of the actual set up. I use an auto top off too. I run my auto top off through a nielson reactor..
.
....................................... 75 Gal sump.

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......skimmer............................................fuge....................................return........................water change
......and dsb

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bad pictures, but you can get the Idea lol
 
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