With 50 years experience in keeping saltwater aquariums exclusively, I feel I must weigh in here. Playing devil’s advocate because of extensive experience is not fun but often necessary. So here goes. Take this advice with a grain of salt.
First, the Red Sea Max systems are well designed BUT limited in their ability to properly house a budding reef. New people in the reefing hobby are attracted to the Red Sea Max because of simplicity of the ALL-IN-ONE design. Everything in one neat package. HOWEVER, that simple design is also their down-fall. The area designated to filtering the water is wholly and totally too small to do the job it’s expected to do.
Here’s the problem, we, as aquarists, tend to add just “one more thing” to our successful reef tank. Problems arise because over time our fish grow larger increasing the demand on the “filter system”, we add new things increasing the demand on the filtering system, we experience deaths and have uneaten food items decaying increasing the demand on the filtering system. I think you can get a picture of where this is going.
The tank pictured above is a classic example of the outcome of a Red Sea Max design that the owner got tired of keeping in tip-top shape. After awhile he simply got tired of replacing the die-off of fish, out of whack water parameters, algae growth, etc, etc. I could go on, but I won’t.
Question is: Is this tank worth salvaging? In my opinion, NO. BUT, my opinion doesn’t matter. It’s YOUR opinion that matters. If in your opinion it is worth buying, putting your time and effort into cleaning, etc, then go for it. BUT...
The advice posted above is okay albeit a bit confusing. Be prepared, mentally, for it to be more work, taking more time than you and others think. Coraline algae, the pink stuff on the glass, can be a pain to get off even with vinegar. I have found using a plastic card (such as an old credit card) useful at removing the coraline. While coraline is generally thought of as a sign of a healthy system, this person let it get out of hand, another sign of growing weary of keeping the system healthy.
Okay enough of my rantings and warnings. As one who put himself through many tank rescues in his long career I wish you, not luck but, success in your endeavor. It is truly a labor of love!
I look forward to your posting pictures of progress as you go forward.
Dick
aka; Amphibious