Can't imagine not having this. From sl1 module to float switches there are endless possibilities with this! (Posted on 4/16/12)

This should make my life easier and seems to have endless upgrade possibilities. The biggest problem will be learning how to best utilize all the function. Almost no instructions. (Posted on 4/12/12)

Ok, first off I want to say that this is in no way shape or form to reflect on BRS. They are a fantastic company and have always given me top notch customer service over the years.

Now, onto the RKL lvl3+. This is a great unit it does the job very well but there are two issues that I have with it. There are ZERO directions. You get some sort of piss poor excuse for a single page fold out pamflet and they expect it to show you how to set it up with that. it only shows a few very basic functions of the unit. In order to figure out some of the more basic functions of this controller I had to go onto their web forum, which after enough digging I found a "user manual" that frankly is garbage. It doesn't even cover how to hook it up to a computer or update firmware onto each module. let alone many of the other functions this controller is capable of, hell it doesn't even cover how to calibrate the PH PROBE! I have been wanting a controller for years and have always looked to Digital aquatics because when compared to the Neptune APEX, the RKL did everything I wanted for $200 less. Yes the are all kinds of other bells and whistles that you an get like webserver capability etc. I just didn't see a need for them. This unit does everything I need it to and then some for a good price. Which you would think for this price there would be some sort of "user manual", that you know, actually showed a user how to use all the functions of the product they just got done spending several hundred dollars on! It really is a wonderful product and does a great job I would just think that for a product with the MSRP this has it would come with something other than many hours of hunting in their boards or waiting for a response to a thread to figure out how to set the damn thing up.

Now for the other quam i have with this unit and its really not a very big one. One of the reasons that I switched over to this was to try and quiet down my tank by using new Hydor Evo pumps on a wavemaker format and a variety of other upgrades. Well I upgraded to the Hydor evo's because they dont knock when turned off an on which is great. only to discover that the relays in the RKL pc4's make a horribly loud knocking sound that frankly makes me rather disappointed in the quality. I mean their louder than any relay you would find in a car by a large margin, maybe thats just because of the amount of power they are rated to run? I'm really not sure but they certainly are NOT quiet. (Posted on 3/28/12)

had to find instructions online but overall this is a easy controller to operate will be buyin another (Posted on 3/17/12)

I really like this controller, it comes with everything and programming from my reef 2.0 is a must along with the BRS video. If I did not do this I think I would still be scratching my head to have it initially set up. However, I am still trying to completely figure this unit out. There is a learning curve but it would be less steep if the instructions were written with less RKL jargon. I still like my RKL and it does make my life easier. (Posted on 3/15/12)

So I listened to the BRS guys and decided to buy a controller right off the bat on a new 90 gallon setup, rather than phase it in over time. I looked at both the RKL and APEX Lite units. Dollar for dollar this system offered everything i needed, albeit without the bells & whistles (which in my experience are nice - but not must haves). I run the RKL on a 90 gallon DT with a 30 gallon sump/fuge.Added the dual float switches for ATO and 'run-dry' protection. Works flawlessly! (Posted on 3/7/12)

I don't know how I ever survived without this thing. It takes so much worry out of reeding. Great value! (Posted on 3/1/12)

I bought this reef keeper plus for my 120g and it works very well. All i wanted was an auto top off for my tank. Well the one i wanted was the tunze and its almost the same price as the reef keeper lite. So decided to go with the RKL which i programed to control my ATO,SKIMMER,RET PUMP,ETC . It didn't come with good instructions but all i did was call Digital Aquatics and they guided me step by step to program what i wanted. Definitely reccomend this controller to any reefer who's on a budget. (Posted on 2/27/12)

This is the first controller I've used and I'm still getting up to speed on it. But I saw several comments about lack of instructions and thought I'd mention that it a product manual is available at reefkeepers website. Also, I received a prompt, thorough, and easy to understand email in response to several questions I asked about my RKL Plus. So far, so good. (Posted on 2/12/12)

This was the first reef monitor I have ever used in any of my aquariums and I have been very happy with it so far. It has saved my aquarium from a kalk overdose as well as a heater failure. This may not be the best controller out there, but it certainly is the best bang for your buck. (Posted on 2/1/12)