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One week ago when I left the alk was 7.5 and now I am wondering is it possible for a reef tank to to go as low as 3.8 and if so will it be terribly harmful to a tank loaded with sps corals or can they ride it out for one more week, when I return?
i have a mild cyano out break and low PH and low ALK. calcium is pretty good at 480 since i use reef crystals it tends to run on the high side anyway. tank setup is a 46 bow with a 20 high sump built in fuge with cheato and a couple mangroves only media i use is chem-pure elite.
I’ve noticed my alkaline has been getting lower each day, past three days I have been adding 10ml of tropic Marin all-for-reef but still the alkaline readings are low or getting lower. I only have soft corals as I’m new to marine keeping. Here are my parameters from tonight: nitrite: 0 Nitrate: 10 Phosphate: 0.03 Alkaline: 6.3 was 7.7 yesterday
Low pH also helps by reducing the concentration of carbonate. Very low magnesium can contribute to the likelihood of precipitation calcium carbonate, reducing alk and calcium in the ratio of about 2.8 dKH of alkalinity for each 20 ppm of calcium. Normal magnesium inhibits that process (doesn't stop it, just slows it).
I am currently sitting at 0.607 ppm with Nitrates around 20 ppm. Corals aren't amazing at the moment. Green and browned corals at the moment.
Ok I have been fighting with high alkaline for about a month, 13-15 my ph is on the lower side as well 7.95-8.0 I can’t does for ph due to my dkh. I have been doing weekly water changes with low dkh about 6-8 I get my salt water from LFS. I do about a 15-20% change, all my number are not to bad.
Wow thanks for that. You've confirmed my suspicions on several different accounts. I am shocked you went with instant ocean though. I recently switched from reef crystals because it was so inconsistent from batch to batch, as well as higher kh. I also found magnesium being a bit low.. 1200 ish, so I'm surprised you found elevated levels in the IO.
In general, I suggest that aquarists maintain alkalinity between about 7 and 11 dKH (2.5 to 4 meq/L; 125 to 200 ppm CaCO3 equivalents). Many aquarists growing SPS corals and using ultra-low-nutrient systems (ULNS) have found that the corals suffer from “burnt tips” if the alkalinity is too high or changes too much.
Just checked my phosphate level in my 50 gallon aquarium and they are through the roof at .43 does anyone have any advice on how to lower it any info is...
In general, I suggest that aquarists maintain alkalinity between about 7-11 dKH (2.5 and 4 meq/L; 125-200 ppm CaCO3 equivalents). Many aquarists growing SPS corals and using Ultra Low Nutrient Systems (ULNS) have found that the corals suffer from “burnt tips” if the alkalinity is too high or changes too much.