Well Pets and Ponds is who I bought my RW8s from and they want me to pay to send a replacement controller :(

thinking of getting a Jebao dp-4. just wondering on those who got one after a few months what do you think of them. any problems you run into, what do you like or dislike about it. thanks

The minimum dose is 1ml at a time (per month if you want). I have a small tank that consumes 1.5ml of calcium and Alk per day, so I diluted the solution by 50% and dose 3 times a day for each, which equals 1.5ml each... problem solved...

Some vendors sell them with a tubing holder, get one if you can

Over a month of use here and no issues, easy to program, easy to calibrate if needed. Ordered 2 more :)

do you recommend diluting and dosing more or keep it strong and dose less.
would it be a good idea to mix 2 chemicals into one container and dose..

If your referring to ALK, cal, or mag then No don't mix them before they go into you tank! These dosers come with 4 pump heads for a reason.

The more stable you can keep the parameters on your tank the better, but if you required 100ml per day for example (of each solution) and dilute by 50% then the pump head will be running twice as long. Split your dose into as many times alternating throughout the day as you like. I'd follow the directions of whatever product you'll use and not bother diluting.
I made that post to show the only problem I've had with this is that my tank and consumption are so small but a simple adjustment was all that was needed to fix the issue.

No complaints about the doser :)

Does the doser coming with tubing?

If not, which kind of tubing did people get?

Looking to add one soon.

No they don't come with tubing but you can get 25ft of silicone Topfin airline tubing from Petsmart for fairly cheap

Thanks for the heads up.

Thanks for the advice. Im going to be ordering one soon.

You're welcome.
If either of you need one I can put you in touch with someone