Low alk help

[kingdomrush]

My system is a 90 G tank with a 20G sump. My turaki bleached and purple slimer frag is slowly bleaching from the tip.

I tested my water with Salifert kit that came back with 0 on Po4,nitrate,nitrite, calcium @420ppm. Alk @5.2dkh

I suspect low alk is what did my frags in. Right now I,m mixing a gallon of ro water with 7 tsp of Baking soda according to the reef calculator. It's currently dripping via gravity to my sump.

Am I doing it the right way?

 

[xenon]

Increasing 1.4 dkh of alk is the recommended maximum per 24hrs using soda ash (recipe #1) because PH goes too high.

If you use sodium bicarbonate (recipe #2), you can raise it faster.

Natural sea water is 6.5-7.0 dkh so if you raise it 1.4 dkh, your good!

 

[kingdomrush]

I'm using BS straight out of the box. What causes burn tip on acros? I dont think it's my lighting since I have it on for onlly 7 hrs/day with T5 6x54w

 

[kingdomrush]

Just so frustrated right now

 

[rogerwilco357]

ph?

 

[kingdomrush]

i dont have a ph meter and dont trust kit but I bet somehow my ph is off too. Low alk = low ph right?

 

[correctamundo]

Low alk does not necessarily mean low ph.

 

[FDAquariums]

are you doing any carbon dosing or adding Potassium?