milesmiles902

Relays are pretty handy. You will need another power source though. I imagine a low volt battery would work. In the past I have used an arduino mega for the power source. That one I posted does have a max of 0.5 amp and 100V switching voltage, or in total 50 watts switching power. Just keep the pump small and there shouldn't be any issues. As a safety, use a second float switch. I have never setup a RO/DI auto topoff. What are peoples opinions of that kind of setup?

Do you mean something like this? It is a pretty good idea. I have seen stuff like that done on videos, but never me personally.

No. no no. The steps before getting an APEX are timers, then arduino, then raspberry pi, then APEX. One does not just jump from timers to an APEX. I do think there is a lot of benefit to using an arduino reef controller, or raspberry pi. Although, it does require programming. Everytime I get one going, I move and have to rip out my old one. Forget my code....yada yada. It is a cheap alternative.

Whenever I have had to hang lights, it was always hooks. Then I came along to these: http://www.thelashop.com/gardening-accessories-1-pairs-yoyo-grow-light-hangers-150lbs.html?gclid=Cj0KEQiA-ZSzBRDp3ITHm5KO_JYBEiQA1JjHHNgSO-h4qlbzKZuuwGrDlA-NEW2CPlGAWJr9msnXqHMaAs1U8P8HAQ On a stand like that, I am unsure. If you don't want to just tie a string around a leg or arm, then maybe a magnet. There are some fairly strong neodymium magnets that when distributed across four hooks could hold a light. Most of the images of your light look like it has legs. Could it sit on your sump?

That's still too much work....nah, I am just kidding. It is a pretty nice system. I really like the balance of ingoing and outgoing water with the ballvalve. How do you get the water up to temperature? It seemed like you just had warm water ready to enter the tank.

I couldn't figure it out. Is this measuring room temperature or tank temperature? In the video he spoke of a heating and cooling plug? Please help me out.

That is one proffesional looking design you have there. I am going to try this myself during winter break. Thanks!

I think you can do it for even cheaper than that if you enjoy DIY. I went one similar to these: http://www.tmart.com/Liquid-Water-Level-Sensor-Right-Angle-Float-Switch_p100472.html?cc=USD&fixed_price=us_us&gclid=Cj0KEQiA-ZSzBRDp3ITHm5KO_JYBEiQA1JjHHOkhZFjrIxZsAdKq-GD2e9zBgaB29ng9M717mZU8vngaAojI8P8HAQ It is really cheap compared to many alternatives. I then found an old pump and spliced the wire of the plug, soldered it, and heatshrinked the wires to waterproof it. Now I just have a bucket that has water with a hose into my tank, when the water level is low, the float switch starts the circuit and pumps in fresh H20. Some people do a double float valve, that will shutoff the pump if it gets too high, but I just leave the sump empty enough to accommodate a bucket if need be. Single point safety is a bad thing. Most definitely. I can always post pictures of my system if you want. Edit: The setup works, but be warned. It isn't the most electrically stable setup. Keep those fish alive.