hmm,

why am I using so much,

baking soda 590gr/gallon mix in 5 gallon can (3 gallon mixed up at a time), I dose about 620 ml a day – spread out over 8 dosing's

Calcium:

I was mixing 500 gr/gal mix in 5 gal can (3 gallon mix at a time) dosed about 610 ml a day – spread over 8 dosing’s

but Calcium was rising and had lots of precipitation, so went with 20% less calcium at the same gallon and dose the same ml at this time

I changed and went lower on calcium yesterday so have to se upcoming week – weeks to find out if this is better


I have about 400 gallons of water in my system,

70% SPS and 30% LPS

tank is about 2 years, SPS corals are medium size

You do have more gallons than anyone who's posted so far.... And your solution may be more diluted than others

What's your Mg at?

for DIY solutions, from the way this post is going, seems the values on the table a little shy of real world

Tank Description: Fish-only with live rock New tank, few corals Low demand Mixed tank Heavy demand (SPS corals)
table cut from here.

110 gallon system. Growth is slow but steady on most pieces.

Ca - 138mL / day
Alk - 144mL / day

150 Gal System. Using Randy's Recipe 1.

Calk - 108ml/day
Alk - 108ml/day
Mag - when needed

mag in around the 1350 to 1400

I gust use the standard recipe:

http://www.reefkeeping.com/issues/20...hf/index.php#5

I do feel I use alot as well, but I dont know, it is what it is I think, thats why it is interesting to se what others use.

I think I'm about 2x as much as others,

and I even find that I defenatly dont have a over crouded SPS tank

i do have everything covered in nice purple coral. algea

I do a 40 gal water change each 2 weeks now, and when mixing new salt I bring the Cal up to 450 and the mag to 1400 by adding some calcium chloride and 5 to 3 magnesium mix