going to PM ya Dan so we dont bug up Mike's thread

In regards to ATO, I also understand the rise in ppm on the initial run off.

It will be programmed to drain off a set amount before diverting to the tank. ProfiLux has the power to do this with programmable logic control and a few solenoids.

RO outlet goes to a T piece, there is a solenoid on both tee ends, one for waste pre tank fill run off and one for ATO. The run off solenoid will be programmed to come on for a few minutes prior to the tank flow solenoid coming on.

So equipment break down.

1 x Miracle star fire Euro braced tank
1 x BWi 5 stage RO
3 x RO electronic solenoids
1 x ProfiLux 3EX
1 x wireless bridge adapter (network is upstairs, tank downstairs so need a link to the controller)
1 x PAB power bar
1 x GHL pH probe
1 x GHL Redox probe
1 x GHL Salinity probe
1 x GHL Humidity/Air temp Probe (this is for the house)
1 x Aqua Digital ozone unit (max on two hours after feeding)
1 x 4 channel GHL slave doser
1 x BM150Pro bubble Magus Skimmer
2 x Tunze 6055 streams
2 x Tunze - GHL control cables
2 x GHL optical level sensors for ATO and AWC
2 x Aquarium Illuminations LED lighting
1 x Ai-GHL control cable
3 x Bubble Magus Balling chambers
1 x Acrylic sump
1 x Aqua Bee 2000L return pump
? x Various amounts of Lockline for the return
1 x Durso stand pipe
1 x Phos/Carbon reactor

I am sure there will be more but that covers the basics.

Mike, where are you getting your Reef Safe Solenoid valves from? I've been searching for a cost viable source for a long time.

Auto top off dot com have done them for quite sometime these are plastic bodied, chemical resistant

Ya, seen them, they are to expensive as well, IMHO

the solenoids are available readily if you want to order from china, they are about $4.00 and then add shipping, so make your own.

www.alibaba.com

Personally I dont think $34 is over expensive either for something pre made plug and play. You can get rid of your storage tank if you have a profiLux for under $80!

http://www.autotopoff.com/solenoid/

When you work out the cost of a storage tank - feed pump - pipework, i doubt the cost comes to much less, also take into account the fact you do not have the space issues and also only having to run 1/4" pipe. For me this method is a no brainer :)

Thx Mike, I was just looking at Alibaba, and I do not want them pre made. I have my own PLC controllers and need about 10 valves for what I want to do. ATO,W/C and membrane flush, all automatic.

In this case it would be cheaper to buy a baby ProfiLux :) its all done for you.

This build by nature will highlight many things that are unique to profiLux so some things may not be adaptive to your own situation, but importantly will highlight what can be achieved. This is also why the build is in our forum and not in the open forum.

Anyway follow the thread you should get some good ideas from it (I hope)