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PBT Part 2 Be Nice


slappers

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pH as you know is a measure of acidity vs alkalinity. "Alkalinity" (not high pH) is the buffering capacity - or how well pH resists being lowered from the addition of an acid (from uneaten food, fish poo etc) Adding sodium bicarbonate adds more buffers (so resists changes further) but this should be used as a quick fix as opposed to being used to increase pH. The best method now is a partial water change as it restores pH and replenishes the natural buffers. I think kalkwasser in your topup water dosed at night is the BEST to maintain good pH (which is when pH is likely to drop anyway) Baking soda is primarily the best way to maintain good alkalinity. Also, test your pH during the day and its likely to be higher than at night.

Dont overfeed, keep GOOD water movement at the surface (oxygenates water - too much Co2 drops pH), dose with kalk at night and do regular water changes and your pH will remain stable.

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Agree with all above.

Also, to make it simple, ph in a reef tank is a function of carbon dioxide in the water, against alkalinty. The carbon dioxide pulls ph down, and alkalinty pulls ph up, but not higher than 8.3 or so. ( Sometimes it will go slightly higher ).

So, to maintain ph, all that is needed is to keep alkalinity at a correct level, and ensure adequate aeration to allow dispersal of carbon dioxide.

PH will then take care of itself.

Alkalinty can be raised as Cracker and Rossco said, by adding baking soda. But remember that the correct balance must be maintained between alkalinty and calcium. So if someone keeps adding baking soda, but not calcium also, things will get out of whack.

Kalkawasser has both alkalinty and calcium in the correct proportion to each other, plus as Chimera and Rossco said, has a high ph so will raise ph during and shortly after dosing.

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powderblue_tang.jpg

Photo by Marc Levenson

Powder Blue Tangs are relatively tough to keep for most reef keepers. This one came with my new tank, and was very thin at that time. I feed Nori every day, and he is always second in line to start eating the dried seaweed clipped to the glass. Recently he has begun nipping at my green star polyps and a Toadstool Leather. By increasing the food amount, this has declined somewhat. The Powder Blue is much thicker now, and very healthy. Every night it is excited to get more meaty foods during the evening feeding. People tend to call this fish an 'ich-magnet' because they are so hard to keep. If you decide to keep one of these fish, be considerate in giving it a big tank that is at least 6' long, feed it well and feed it often. Reef-safe.

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