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Actually the PO4 was due to ground water intrusion at the point where the intake is as evidenced by a salinity of 24 ppt, and that ground water comes from GGP where they water the plants with grey water so we also saw ammonia in the water. Also, we were using lanthanum to remove the PO4 from the...

Just wanted to comment on the ratios I see being mentioned on the forum. Just to clarify the formula of NO3/PO4 * 1.53 does not give a ratio of NO3/PO4 but of N/P. So if you are adding NH4 this is a source of N as is NO3 and NO2. Normally NH4 is undetectable in aquaria as it is quickly utilized...

As others have mentioned consider adding Lysmata wurdemani shrimp. They will take out the small ones pretty quickly. Sorry, I don't know what else you have in the tank but you could also try a juvenile Chaetodon kleini or C. lunula, or filefish Acreichthys tomentosus. You may have to remove...

When were you at the Museum? I was there June 17, 2024. The alkalinity and Ca levels in all the coral tanks there are maintained in the same way as the big tank, sodium bicarbonate powder just tossed into the sump before the lights go on, and CaCl2 tossed into the sump much later in the day...