Automatic Water changes. It doesnt get any better then this.

[Swine]

ddavies, How did you make a drive shaft for all three?

 

[ddavies564]

So if I am seeing this correctly you purchased three of these but just used one motor and rigged new rods and a drive shaft? Oh and bought new tubing ect.
Thermofisher D3138 13 w Masterflex 7024 20 Pump Multichannel Clear Polycarbonate | eBay

The pumps are made to be stacked together, no mods were made other the the screws needed to be longer.

 

[ddavies564]

 

[joekool]

I think it's a very cool idea. Has anyone considered the amount of new water they are taking out while adding new water. I know in very small amounts but it does happen. I would think that if you had a sump big enough I would prefer say take out two metered gallons then put in two metered gallons but not at the same time. I would have to do 3.5 gallons daily for myself.

After a whole year how much new water are you taking out while adding. I really like the take out then put in method myself but think it would be really cool to automate it with an apex. I gues you would need two pump setups then.

 

[ronnie]

WOW Ronnie- If i understand correctly i am better off just buying a $50 autotopoff.com dual float switch and passing the electrical wire to the APEX 30 feet away. Power cord will cost just a few dollars. Please LMK if im wrong.

You won't have failsafes in place with just the auto top off floats as you can't tie them into the apex without the breakout box. You could run the wires to the base unit, though. I just don't have the room on my breakout box under the tank to add more, so I need another one. And I bought the PM2 for salinity, so I can use it anyways.

 

[ddavies564]

I think it's a very cool idea. Has anyone considered the amount of new water they are taking out while adding new water. I know in very small amounts but it does happen. I would think that if you had a sump big enough I would prefer say take out two metered gallons then put in two metered gallons but not at the same time. I would have to do 3.5 gallons daily for myself.

After a whole year how much new water are you taking out while adding. I really like the take out then put in method myself but think it would be really cool to automate it with an apex. I gues you would need two pump setups then.

This is where strategic line placement comes in to play, lol.

 

[joekool]

ya lol. Why not just put a pump in the gulf of mexico and run it to my tank with a UV of course. Has anyone seen the salt mixing units at the LFS I saw one that mixes saltwater to the set salinity. cool but expensive i bet

 

[KoleTang]

ya lol. Why not just put a pump in the gulf of mexico and run it to my tank with a UV of course. Has anyone seen the salt mixing units at the LFS I saw one that mixes saltwater to the set salinity. cool but expensive i bet

That's pretty cool. My best guess is that they have pre-measured amounts of salt being dumped in and possibly a conductivity probe to double check.

 

[KoleTang]

ddavies, is there anywhere else those pumps can be obtained besides that supplier? (He only has 10 LOL)

You need the motor, pumps, tubing, new screws, power supply (specs?), and what else?

 

[ddavies564]

This is really the only other place.
http://www.coleparmer.com/Product/M..._S_24_tubing_PC_housing_CRS_rotor/LS-07024-20

Or others on ebay but for a water change the pump needs to be one that runs large tubing like the ones I use.

Needed
2x Pump from ebay
New tubing from McMaster Carr
3 amp power supply 5-12 volt power supply
Longer screws

Optional
Maybe a new motor cheap insurance.

 

[ronnie]

Do you have a source for the motors?

 

[ronnie]

That's pretty cool. My best guess is that they have pre-measured amounts of salt being dumped in and possibly a conductivity probe to double check.

I'm contemplating doing this with my apex and the conductivity probe. Utilize a hopper that will dump a small amount of salt in until the salinity gets to 35

 

[KoleTang]

I'm contemplating doing this with my apex and the conductivity probe. Utilize a hopper that will dump a small amount of salt in until the salinity gets to 35

I've have thought about it as well. What sort if hopper are you thinking?

 

[KoleTang]

This is really the only other place.
Masterflex Standard pump head for L S 24 tubing PC housing CRS rotor - LS Standard Pump Heads for HighPerformance Precision Tubing from Cole-Parmer

Or others on ebay but for a water change the pump needs to be one that runs large tubing like the ones I use.

Needed
2x Pump from ebay
New tubing from McMaster Carr
3 amp power supply 5-12 volt power supply
Longer screws

Optional
Maybe a new motor cheap insurance.

Something like this? (Amazon.com: Pyramid PS3KX 3-Amp 12-Volt Power Supply: Car Electronics)

I'm lost in the tubing aisle. LOL (McMaster-Carr)

Any info on the motor?

 

[ddavies564]

Something like this? (Amazon.com: Pyramid PS3KX 3-Amp 12-Volt Power Supply: Car Electronics)

I'm lost in the tubing aisle. LOL (McMaster-Carr)

Any info on the motor?

Was think more like this.
http://www.powergatellc.com/mean-well-gs40a-power-supply.html

Tubing has to be 1/4 x7/16 neoprene or scillicone.

 

[Sacohen]

I think I'll try an adjustable power supply to see if I can slow it down some (if it makes much difference). At the full 200rpms, I only need it to run four minutes a day. I'd be ok extending that out to 15 min or so if slowing it down works.

ronnie;

4 in a day equates to how much water?
I'm trying to see how much per min theses pumps turn over.

The tubing is part number #51075K28 and it fits the 7024-20 master flex head.

KoleTang;

ddavies564 posted the tubing part # earlier. I put it above for easier refference.
It's abot $1.52 a foot

 

[ronnie]

About a gallon a day if it runs at the 200rpms

 

[Sacohen]

Thanks ronnie.

 

[impur]

About 2 years ago these pumps were so cheap. I got mine for 40 bucks and it seems to be brand new, on the cole-parmer site it retails for $1100. I got my pump heads for 15 bucks each. Now these things are way more expensive, I think reefers drove up the price lol

 

[ddavies564]

ronnie;

4 in a day equates to how much water?
I'm trying to see how much per min theses pumps turn over.




KoleTang;

ddavies564 posted the tubing part # earlier. I put it above for easier refference.
It's abot $1.52 a foot

There's a flow chart on the link I posted above the pump moves 2.8 ml per rotation. A gallon is 3752 or something, divide them out and then figure time by what ever rpm setup u are running.