Neptune DOS Auto Water Change Plumbing Question

Patrick Cox · Jan 15, 2023

I am setting up auto water change on my new aquarium. My saltwater container is 43" high (40 gallons). My question is... what is the best way to plumb the 1/4" RODI tubing to get to the bottom of the saltwater container? The tubing is very "curly" so I can't get it to the bottom of the container. The only solution I could come up with is to use a uniseal to insert a 1/2" PVC pipe and then fish the 1/4" RODI tubing down through the PVC. Any better suggestions? Here is a work in progress picture of my containers...

Thanks!

Bret · Jan 15, 2023

Patrick Cox said:
I am setting up auto water change on my new aquarium. My saltwater container is 43" high (40 gallons). My question is... what is the best way to plumb the 1/4" RODI tubing to get to the bottom of the saltwater container? The tubing is very "curly" so I can't get it to the bottom of the container. The only solution I could come up with is to use a uniseal to insert a 1/2" PVC pipe and then fish the 1/4" RODI tubing down through the PVC. Any better suggestions? Here is a work in progress picture of my containers...

Thanks!

You’ve got a few options:
What I did was install a magnetic probe holder that has slots for the1/4” rodi tubing, set the probe holder at the bottom of the tank to keep the tubing straight and drawing from the bottom.
https://www.ebay.com/itm/2654982611...t2Fh_wCRlK&var=&widget_ver=artemis&media=COPY
Another option, which I would go with if I did it again since it’s a little cleaner/more professional, is to use rigid 1/4” tubing and a 1/4” pushlock bulkhead fitting. Install the bulkhead in the top of your tank, and run the rigid tubing straight down to your desired depth.

you could also put a1/4” bulkhead towards the bottom of the tank and run the tubing on the outside. This would be the easiest/cheapest solution if you have enough flat area on the tank to install the bulkhead, and can find a way to tighten it.

Patrick Cox · Jan 15, 2023

Bret said:
You’ve got a few options:
What I did was install a magnetic probe holder that has slots for the1/4” rodi tubing, set the probe holder at the bottom of the tank to keep the tubing straight and drawing from the bottom.
https://www.ebay.com/itm/2654982611...t2Fh_wCRlK&var=&widget_ver=artemis&media=COPY
Another option, which I would go with if I did it again since it’s a little cleaner/more professional, is to use rigid 1/4” tubing and a 1/4” pushlock bulkhead fitting. Install the bulkhead in the top of your tank, and run the rigid tubing straight down to your desired depth.

you could also put a1/4” bulkhead towards the bottom of the tank and run the tubing on the outside. This would be the easiest/cheapest solution if you have enough flat area on the tank to install the bulkhead, and can find a way to tighten it.

Thanks for your reply.

The magnetic probe holder sounds like a good idea. So I guess you just attach the tubing and then use the magnet from the outside to drag the holder to the bottom or the container?

And then do you know where to buy the rigid 1/4" tubing? BRS doesn't sell any that I can find.

Thanks!