Switching Salts

[gaberosenfield]

Like rygh, I use IO regular and I used it on my last tank in Texas as well. It's cheap, easy, and I works fine. For me, it mixes up to Ca = 430 - 450 ppm, dKH = 8 - 9. My new system hasn't had much growth yet, but I had good growth of sps and a clam in my system in Texas. If you have a big calcium demand, you'll end up dosing Ca and alk in some way between water changes anyway, so you might as well use a cheap salt. Besides, I read some posts on reefcentral from people who run public aquaria and they said that most public aquaria either use regular IO or make their own salt mixes (like the Steinhart aquarium does). Point is the regular IO works fine.

 

[bluprntguy]

I just came across a few articles showing RC to have 13 dkh? If thats the case, wont I have even worse Alk spikes than RSCP?

Seems like most people say IO reef crystals mixes a little over 12.

What alkalinity is your tank generally running?

 

[wpeterson]

I'd like to point out that the concentrations of minerals delivered with the salt are proportional to the specific gravity you prepare your saltwater at. The folks who've documented 13 dkh Alk in IO Reef Crystals were measuring it at 1.027 sg.

When I prepare Reef Crystals at 1.025 it's more like 10-11 dkh and 420-440 calc.

You should be testing your tank water and water change water to make sure the water change levels are the same or slightly higher (for the sake of supplementing). You also need to consider the relative size of the water change vs. the total tank water volume. IE: a 50% water change with 2 dkh higher alk is a shock, but a 10% water change with the same water may not be.

 

[Nav]

I used my maintain 9.6-9.8 dkh with 20% PWCs and last 5 PWCs of 33% has brought it stable to 10.5... and I mix at 1.025 always.

So if RC gives 10-11dkh at 1.025, then I think I'll be good Will place the order now! Thanks for all inputs.

 

[rygh]

Being curious, I decided to measure during lunch:

Standard Instant Ocean salt mix. Mixed in RO+DI.
Mixed 5 days ago.
Mixed to 1.026 (refractometer)
I do add a bit of Mg before adding salt to RODI, so I will not measure that.
Alk = 11.2
Calcium = 390
Both tested with Salifert.

So pretty nicely matches that table. Well within error margins.

For my tank, I normally tend to run about Alk=10, CA=400

 

[Nav]

Am I still missing something basic? If you keep Alk at 10 and your PWC water is 11.2, wont there be a rise? What if a BTA juiced up and u had to do a 40% PWC? Wont the Acros hate it?

 

[rygh]

Am I still missing something basic? If you keep Alk at 10 and your PWC water is 11.2, wont there be a rise? What if a BTA juiced up and u had to do a 40% PWC? Wont the Acros hate it?

Well, a 40% water change of 10.0 with 11.2 would result in only a 5% Alk level change.
Not a big difference.
And that Alk change will have even less of an impact on PH.

 

[Coral reefer]

Am I still missing something basic? If you keep Alk at 10 and your PWC water is 11.2, wont there be a rise? What if a BTA juiced up and u had to do a 40% PWC? Wont the Acros hate it?

You are over thinking this now

 

[Nav]

You are over thinking this now

Lol, no it really doesn't matter a lot to me but hardcore reefers keep saying Alk stability = SPS success. I'm slowly getting into Acros and just making sure I'm doing it right

 

[wpeterson]

Lol, no it really doesn't matter a lot to me but hardcore reefers keep saying Alk stability = SPS success. I'm slowly getting into Acros and just making sure I'm doing it right

Do you have an ATO? I'd worry about stability in this order: Salinity, Alk, Calk.

If you're fluctuating salinity on a daily basis, changes in Alk are a long second to that in terms of SPS stress.

 

[Reefer_Addickt]

I want to try that hw-marinemix from BRS. I've always used IO or now IORC.

 

[aqua-nut]

Do you have an ATO? I'd worry about stability in this order: Salinity, Alk, Calk.

If you're fluctuating salinity on a daily basis, changes in Alk are a long second to that in terms of SPS stress.

I'd add - if you are not dosing automatically and have a large SPS load, your alk is fluctuating during the day.

BTW, we need a new acronym. I'm proposing ADS, automatic dosing system!

 

[Nav]

I have an ATO so Salinity is exactly 1.025 always. My doser also loads Alk, Cal & Mag twice a day...

 

[rygh]

Other issues to consider

1) Mixing the salt itself!
The various chemicals can stratify during shipping.
If you do not mix it all at once, or stir contents, you can have issues.
Example: See reviews on hw-marinemix at Amazon where Alk was only 3.

2) Moisture and clumping!
If you let salt sit exposed to the air, it will pick up moisture.
For the pure salt part, not a big issue other than a few clumps.
But for the other chemicals (Alk/Ca) they can react and be ruined.

----

If you get standard IO in the big 200G box, internally it comes in smaller bags.
Dump one in a normal large salt bucket, and mix easily.
The other bags stay sealed, so last longer.

I have considered switching to a fancier salt many times. But seems like
there is always something....

 

[Nav]

I'm seeing more IO than IO-RC users...

 

[BAYMAC]

I'm seeing more IO than IO-RC users...

Yup... poll the old crusties and you find that still to be true.

 

[tygunn]

I use plain old IO. I used so much of it when I ran my 140g tank with 100g sump that I didn't want to spend the extra dough on the fancier salts. Back then I had a certain amount of Ca, alk and mag figured out to add to each new 34g brute to get it just right.

 

[aqua-nut]

Other issues to consider

1) Mixing the salt itself!
2) Moisture and clumping!

I have considered switching to a fancier salt many times. But seems like
there is always something....

Those were two of the main reasons I switched to ESV. I don't mix in whole bag amounts so those items are a big deal for me. ESV does clump but because it's just pure NaCl or Mag Sulfate (can't remember the formula ), the clumps break up real fast and don't ruin the salt.

The other big ups for ESV...
The dry parts are larger particles than the one part mix so there is no dust. My nose and skin do not like the dust!
There is no crud left in the mix container. With RSCP, I'd get a large amount of white precip. I'd clean pump, barrel and heater after every one or two batches. With ESV, I've gone thru three boxes (600g) of mix and there is NO precip!

The BIG negative of ESV is cost. It's like liquid gold!! I hope the beasties appreciate how they are being pampered.

 

[robert4025]

I am going to be be a biased SOB and go with Microbe-lift FTW....mixes clear right away, dead nut on parameters, and doesn't have funky smell out of the bucket and doesn't require silly use instruction. Sold thousands of buckets for over 6 years now with maybe one complaint! Wish I can say the same for other salts I carry. For the record, I carry AquaVitro, RSCP, IO, RC, and sometime even ESV.

 

[BAYMAC]

Hmmm what's the going rate for a 200g mix of it Robert?