Automatic waterchange with top off design - please gimme some feedback

[kien]

The only comment I have add to all the other great comments is that I don't really see where you are going to put the plutonium rods.. You seem to have accounted for everything else

[Milad]

the reason im not using dosing pump is because of the chance of the "drain" getting plugged since the pipes are so small.

Also I could remove the "drain" pump (and one float) then just use the return pump if I could find a 3/4" electronic solenoid. I would put a T connector where the return goes back up to the tank.

If the apex controller will let me, ill do a "turn on until float switch is active" or "2min is up" this way i cover my butt twice.

I also might put a emergency drain from the SW mix tank to the drain on the other side just in case the solenoid gets stuck open and the SW mix tank overfill. Im just not sure if I can put a bulk head on a plastic container.

As far as the return siphon, I haven't decided yet but I might not have under water, might just be barely above the water so i wouldnt get to much siphon.

[kien]

Originally Posted by Milad

As far as the return siphon, I haven't decided yet but I might not have under water, might just be barely above the water so i wouldnt get to much siphon.

If you do this you will get some (or a lot) of splashing and depending on where your light is possibly lots of salt creep on your light (or edges of your tank). Plus you are introducing noise to your system if you do this.

[banditpowdercoat]

That's how I am planning my Auto WC system. If I ever get time

[golf nut]

Originally Posted by Milad

So i woke up in the middle of the night (4:37am) with this brilliant design for a automatic water change system

Here is the model of it:

So here is basically what happens
All this is wired into the Apex controller and break out box
A pump sits in the left side of the sump by the skimmer and just waits for XXX time. When the time comes (lets say Sunday 4pm) Apex controller turns off the skimmer and return pump and solenoids. This levels the water out in the sump. The pump on the far right of the sump starts pumping out water from the skimmer area down a drain. Once it hits the lower float valve it stops the pump. Next the pump in the SW mix container turns on and starts pumping water into where the drain pump was pumping out of until it hits the upper float valve. BOOM, water change

After this is done, return pump is on, skimmer is on
solenoids turn back on and the sw mix solenoid starts pumping water into the sw mix container until it hits the float switch. i come home from drinking around 8pm, pour in XXX amount of salt into the sw mix container and wait until the next water change.

thoughts?

The water changes will only be as big as whatever my skimmer area can hold.

Did you do a wiring diagram?

[Milad]

there is no real wiring
im using apex controller, everything plugs into a 8port power strip that comes with the controller and the floats plug into the break out box

[banditpowdercoat]

Have you got your Solenoids yet? I have a shipment coming in soon, if you need some.

[Milad]

nope havent bought them
what kind you got?

Originally Posted by banditpowdercoat

Have you got your Solenoids yet? I have a shipment coming in soon, if you need some.

[StirCrazy]

I say it looks good. I would set it up to do it every day for two weeks with freshwater only as a trial befor you set everything up in salt though. this way you can time it so it happens while you are there and can do some fine tuning.

Steve

[amoreira]

Looks like a good setup. A couple of comments I have... You'll need a circulation pump and a heater in the salt-water make-up tank to mix the RODI water with the salt and heat it to the desired temperature.

If you want to go to the nth degree, you could have another hopper with salt mix with a load cell on the make-up tank. You could automate adding the salt mix, the water and the mixing. Unfortunately, Apex controllers don't take generic 4-20 mA analog signal inputs or outputs. For this sort of thing you'd have to buy a separate PLC (programmable logic controller).

I was thinking of automating this water change. But as others have mentioned, I use water change time to clean the DT of hair algae, cyano and detretius. Except for scraping algae, this is the only thing I don't have automated in my tank (Auto-feeders, ATOF, Ca Reactor, Light timers, etc.. make life easier).