<b>Comments in bold...</b>
Performed my first 40 G water changeafter switching to reefcrystals. Fresh mixed water without any additions tested as follows:
Temp 81
Salinity 1.025
PH 8.4
Ca 460
Mg 1140
Kh 19 (tested 2 times!!!)
<b>That's hard to believe. Have you posted this number in the chemistry forum? Have you mixed up another batch yet? Do you have more than one bag/bucket to compare these results?</b>
Tank water tested as follows 1 day post water change:
Salinity 1.025
Temp 82
pH 8.3
Ca 500
Mg 1000 ( had dropped from 1260 in My-June to 960 in Jul and now up to 1000)
dKH 12
No3 30-35 like Jul
Po4 0
Do you think I should add Epsom salts to increase my Mg further or just rely on water changes with Reefcrystals which has more Mg?
<b>You definitely need to raise up Magnesium. I would either buy a bunch online or make it yourself. I do realize you may not be able to get the same products we use, but Randy's Recipe #2 for Magnesium is excellent and will get that number up. Mg is supposed to be 3x the calcium level. From your numbers above, Ca is too high, and Mg is too low. I would suggest raising it to 1300-1350ppm. Jdieck has a great calculator you can use to determine how much (and of what kind) Mg you'll need to add to get the number to your goal range.
http://reef.diesyst.com/flashcalc/flashcalc.html</b>
I'm afraid I can't rely on Purple up, CA balance or Kalkwasser that I still don't have as they'll increase my Ca further.
<b>Both your alk and ca are plenty high. I'd like to see them drop. Purple Up doesn't affect calcium, but C-Balance and Kalkwasser do. I'd stop dripping & dosing that for at least 48 hours, and retest. If the numbers are still high, wait again. You can test daily. You may not need to dose for almost a week, but please test the water regularly instead of just sitting there waiting. Make sure it doesn't drop too quickly.</b>
Do you think further additions in Ca or Kh will have any side effects? do you think I should keep on maintaining them weekly or cut off to 1 dose of Ca balance every two weeks instead of weekly?
<b>Stability is key. If you can determine what your tank needs, you can dose the proper amount daily or weekly. Daily is better because the water will have less of a swing in parameters.</b>
I'm also hoping my waterchanges will handle the nitrates a bit more for my DSB to kick in or til I have better Caulerpa growth. I'm already seeing better growth in the refugium however not to the desired levels. I still didn't prune caulerpa since I started this tank (4-5 months now) and I guess it still needs a few months before needing a pruning.
<b>Either the light isn't strong enough or the water doesn't have enough nutrients to support plant growth.</b>
I'm using this power Saving lamp that consumes 23 W and should give around 120W. i still have to get a reflector for it. do you think I should add another one too?
or maybe use a 70 W MH that I have laying around with a 6500 K bulb or would that be overkill?
<b>A reflector would really help get the light where you need it.</b>