The Renew...
"Exceptionally effective carbon replacement. Controls ammonia nitrates, phosphates, and chloramine."
Chloramine can easily be dealt with by treating new water when it goes in the tank. Nitrates get reduced with water changes, so with good maintenence this will not be an issue. Chemically removing ammonia can actually be BAD for a tank since they good bacteria can starve and you could have to cycle a tank all over again. Ammonia removers should only be used in an emergency. A seperate phosphate remover could be used if you had really high phosphate tap water in your area.
de*Nitrate...
Again, nothing will substitute good maintenence. Nitrates should never be an issue on a tank that gets regular water changes and it not way overstocked on fish. A lot of people purchase products like these to avoid maintenence. I am not saying you are, but I think most people see these types of things as ways to be lazy
This also goes back to why many people try not to use and chemicals or speciality treatment items on their tanks. Constantly trying to mix up the correct dosing of various water additives and treatments can be more difficult on the fish because everything can flucuate during each water change. The only things I add to my tanks are water treatment for chlorine and chloramine, and one teaspoon of aquarium salt per 5 gallons of water. This works good for me, and keeping it simple also ensures that the fish have a stable environment to live in. The possibility of something going and changing the water conditions is very low.
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*26 freshwater*
2x Sunburst Platys (2M, 2F) // 3x Neon Tetras (?) // 2x Cherry Barbs (1M, 1F) // 2x YoYo Loaches (?) // 1x Bushy Nose Pleco (M) // 1x Clown Pleco (?) //
*15H marine*
-30# Live Rock
-Mixed Snails (Nassarius // Cerith // Astrea // Black Turbo // Mexican Turbo)
-8x Blue Leg Hermit Crabs // 1x Banded Serpent Star // 1x Cleaner Shrimp
-1x Royal Gramma // 1x Percula Clownfish
-2x Mushroom Leather // Metallic Green Star Polyps // Pulsing Xenia // Striped Xenia // Blue Mushroom
-Remora + Maxi-Jet 1200 // 2x Maxi-Jet 600 // Maxi-Jet 400 // Visi-Therm Deluxe 50 // Current USA Orbit 2x 40w
PC
. But otherwise, you shouldn't need any product to get rid of ammonia/nitrites/nitrates. 
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