millie bleaching

[reefman77]

a green millie i have had for about 4 mounths started to bleach from the tips. 2 weeks ago I did a waterchange with IO salt and after it the polyp extention was realy bad. the color has been very good until today when it started to bleach

Salinity 33ppt
nitrate nitrite amonia Phosphate 0
PH 8.2

[twon8]

alkalinity?
calcium?

[Bebo77]

Mg level?

[reefman77]

Calcium- 500!!! dont think its right tested twice but I have been battling with LOW calcium since I got the tank

Alkalinity- 15DKH!!! I think I found my problem. How do I lower alkalinity?

[Bebo77]

dude its both.. stop dosing what ever you are dosing turn off the Ca reactor, Kalk reactor. Do water changes every day. how big is your tank?

[reefman77]

its a 120. not running a calcium reactor I dose 2 part for calcium

[twon8]

you are dosing too much, stop for a while, the levels will come down over time.

[reefman77]

what do I do to keep the PH up if I dont use buffer durring water changes.

[twon8]

i wouldn't worry about the ph, with alk that high ; do very small waterchanges, like 5-10 gallons; imo there is more stress to the coral from changing the alk drastically which a large change will do, as evidenced by the negative reaction. ime acros can take the elevated levels for a time, but they should be brought back down slowly, let them come down on their own. i wouldn't even do water changes, just maybe some carbon.