Need some calcium reactor help! A LITTLE HELP WOULD BE NICE

[vanreefer]

Originally Posted by Railskinner

I have just set up a calcium reactor as well. Last night

calcium 440/alk 11/ ph 8.3 /salinity 1.023
77 gal/33 gal sump

5lbs tank/ milwaukee regulator/bubble counter/soleniod/needle valve /sms122 controller.Followed intructions for set up and ph was about 7.8. So i raised the bubble counter and then it dropped to 7.4

ATM I have everything working bubble counter set at about 150 drops per minute/ effulent at 180 drops. Ph was at 7.4 This morning I looked at ph controller and it's reading 7.0. I 'm trying to get this down to about 6.5- 6.7. If l turn the bubble counter up more and keep the efulent flow the same will this knock the ph down for me.

With that size tank unless it's overflowing with large sps colonies I would slow down the drip rate to ~120 min and bubble count to about 60/ min and come adjust the reactor slowly from there

A basic rule of thumb to start is ~ 2 drops of effluent to one bubble... then test ph CA and ALK if all are fine then leave'er be if the ph is low, then so will the alk, just increase the bubble count. If the Ca is low but ph is OK-low and the ALK is high, only adjust the drop rate.

Summary
Low alk---> increase the CO2 bubble count
Low Ca---> increase the drop rate
Low Alk and Ca but good PH----> increase both in the 2:1 ratio (drops:CO2)
Good Ca and Alk but low PH---> leave it and check again in a few days
High alk and low Ca---> check Mg if OK (above 1350) increase drop rate

These are the general rules of thumbs I have used to dial in my reactor...

HTH
Dan

[Tarolisol]

Well, things are going screwy, ive began increasing my calcium with an additive, seachem, i also was trying to increase my magnesium but its gone down and my alk well its sky rocketed

PH 8.35
Calcium 300ppm
Alk 15dKH
mg 900 somthings

[Pescador]

Which Seachem product are you using? Reef Complete? And your leaving the reactor off for now?
If it is still running is the Zeomag you have in your reactor a type of Dolomite?

If it is this might apply

It has been suggested that adding dolomite to CaCO3/CO2 reactors can help with magnesium problems. Dolomite is a material that contains both magnesium and calcium carbonate. If dolomite is added to the reactor to maintain existing appropriate magnesium levels against their continual depletion via calcification (for example, if the calcium carbonate used is too low in magnesium to maintain adequate magnesium), then this is a fine approach. Aquarists might typically use on the order of 10% of the media as dolomite (and 90% as calcium carbonate).
However, this method is unsuitable if the goal is to raise magnesium levels. The problem is that for every magnesium ion released from the dolomite, two units of alkalinity are also released:

MgCO3 à Mg++ + CO3--

Consequently, raising magnesium in this way by 100 ppm will necessarily raise the alkalinity by 8.2 meq/L (23 dKH). The only way around this problem is to add a mineral acid (not vinegar) to the aquarium to reduce the alkalinity, and that may be more problematic than just adding a magnesium supplement in the first place.

http://www.reefkeeping.com/issues/20...f/index.php#10

[Railskinner]

day 4 with reactor set up
troubles now
sality1.023
calcium 460
alk 15 dkh - (was at 11 to start jumped to 15)
mag-1260
temp -78.9
turned down reactor to a 1(co2):2(drip effulent) 60/120 ratio and my alk has went thru the roof to 15, efulent ph reads at 7.4

last night i dropped the co2 rate to 30 drops per minute and alk has dropped to 13.4
i turned up the drip of efulent a bit , almost a steady run.This morning i noticed that the efulent has raised to 7.7 on the Ph probe.Would this cause the PH to raise as now that there is more flow thru reacter because of drip rate is higher?
Also should this lower the alk reading as well?

[vanreefer]

Originally Posted by Railskinner

last night i dropped the co2 rate to 30 drops per minute and alk has dropped to 13.4
i turned up the drip of efulent a bit , almost a steady run.This morning i noticed that the efulent has raised to 7.7 on the Ph probe.Would this cause the PH to raise as now that there is more flow thru reacter because of drip rate is higher?
Also should this lower the alk reading as well?

Exactly Ph has gone up because the amount of CO2 inside the reactor is less Co2 is only lowering the PH to allow the media to disolve
It looks as though the reactor was fairly close to what you wanted just too much alk and maybe a bit to high on the ca... I would go to about 45 bubbles/min and an elffluent of still around 100-120 drips /minute

Decreasing the Co2/(increasing the PH) will slowdown the disolution of alk... slightly decreasing the effluent rate will lower the Ca disolution... I would also try to raise your Mg as this is vital to maintaining ionic balance of Ca and Alk

[Railskinner]

i will give a test of all the parameters tommorow morning
i"ll get the mag up to 1350 ish.
set the co2 rate at about 45/minute and the drip of the efulent at about 120
/minute. Ph of the efulent is at 7.6 atm (11.40 pm)
hopefully i'll get the alk back down.

[Railskinner]

finished testing this morning
Salinity 1.023
mag 1360
calcium 440
alk 11.8
efulent ph 7.4
45/co2 120/drip
Seems that the ph probe reading will not drop any lower
i recalibrated the probe this morning thinking maybe it might be out of wack.