Alex T.
Active member
Great to see this topic up. I also have noticed a lighter color on my colonies, and havent changed light over about 7 months. I have a heavily stocked sps 80 gal tank with two fish that i feed lightly. Recently(past 2 months) i replaced my cone skimmer rated for a 150 gal tank to another rated to 300+ gal tank due to a great deal. I also have been replacing rox .08 carbon every two weeks, so i think my nutrients have been really low. I havent checked my nitrate levels, but my po4 is almost undetectable. Should i maybe start increasing with aminos maybe? Here is a pic of the tank
![]()
Honestly, why spend the money on aminos until you've exhausted better options? Remember that corals are animals. As they grow, they need more food just like any other living organism on the planet. I think this is why so many people say that their frags were colorful but as they grew they got pale. If you ate the same volume of food as a 5 year old that you did while being spoon fed Gerber baby food in a jar you might look pale and weak too:lmao:. This goes for fish as well. As they grow, they need more food. It's just the way it is.
Why not just get a couple more small fish and feed a little more? ULNS influence has gone too far IMO. People are starting to keep their tanks so clean that the same characteristics show up on many a thread about pale corals, tissue recession and polyp retraction. I didn't even see good colors in my SPS until nitrates reached 5ppm and phosphate climbed over .03ppm. Ever notice how some people can pound a 6 foot tank with three 400 watt halides for 8 hours with t5 supplements and their corals are rich like the rainbow? Then, you notice that their fish are fat and the corals get fed a couple times per week as well? Then we make the case that it would bleach our SPS in two days if we ran that much light for that long. It's no coincidence in a non-ulns system that feeding brings out colors and export is just as important. One without the other and it just won't work. Have you ever tested the water your colorful frags came in? I bet you'll be surprised at what you find. I was.
Undetectable levels are great if you're feeding a lot of food, but too many people are expecting their SPS corals to be pounded with bright light for photosynthesis without giving them enough energy in food to actually color up and grow. I don't keep a lot of fish but I do feed them a lot. The more I feed, the more water I need to change. A skimmer, carbon and gfo can only do so much. The fear of nuisance algae and losing all my SPS because of feeding too much use to scare me too. The funny thing is that as the corals grow and take over the aquascape, they consume a good amount of nutrients too, and nuisance algae has a harder time getting a foothold. I'm no longer afraid of measurable levels of nitrate and phosphate, and no longer embarrassed to say my tank runs a little dirty. Fatter fish, more colorful corals and a cleanup crew to take care of what I can't get to is my current MO.
As for ROX carbon, I'll never run it again. In fact, I no longer run carbon in a reactor either. I change out a small amount in a mesh bag once a month and leave it at that. I'd much rather do larger or more frequent water changes than try and keep nutrient levels low by not feeding.
Just my .02