Title:
I think these are what Shane is talking about.  I have bought them online at pet warehouse for 19.99
I have also seen them in the tanks at my LFS
 

Controls water chemistry and eliminates major water quality problems! Limits phosphates, ammonia, and heavy metals; buffers pH; and provides a constant supply of vital calcium, as well as all other essential trace elements and microelements.

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Shane Clays
Sent: Thursday, May 31, 2001 9:42 AM
To: '[EMAIL PROTECTED]'
Subject: RE: Alk and pH questions...


I like them a lot. They have been around for a long time, and honestly,
might be hard to find because b-ionic and such have done a much better job
marketing their products (does anyone on this list carry them?). I get them
at the LFS. Basically, they are a small block of calcium and the larger the
tank, the more blocks you use. My 70 gallon uses 4 of them per week. It is
nice because you plop them in the system, and then the only thing you need
to worry about it your alk. You, of course, have to keep an eye on your
calcium levels, but once you get a pattern established, you will know when
to replace the blocks, and how much alk buffer to add daily. I have them in
my sump. They also add strontium to the tank.

It takes a month or so of measuring calcium and watching the blocks. Soon
you see a pattern of days where your calcium will go up a bit (after the
addition of blocks), will level off and then as the blocks dissolve, calcium
will drop. The goal is to know how many blocks to add to get calcium to
level off at  420-450 ppm, and then when that starts to drop and you need to
add more. I also watch my pH. If my pH starts to go up higher than normal,
that is an indicator to me that the calcium levels are starting to drop. I
then will test and add more.  The nice thing is that if you find your
calcium levels are not where you want them, you simply add another block or
add less next time. I was struggling with the whole pH/alk/caclium thing
then after I started using these, it has been smooth sailing (well, except
for my recent concern of my alk being to high).

Honestly, these are probably the easiest calcium/alk system that I have ever
used. I am sure a reactor would be even easier, but my pocket book does not
think so, right now. Speaking of pocket book, these blocks are a bit pricey.
I spend about 25 bucks every 6 weeks to keep the calcium blocks in my 70.
Then I have to buy pH/alk buffer as well.  To me, they are well worth it.
Very reliable easy system to use.

IMO

Shane C.

        -----Original Message-----
        From:   [EMAIL PROTECTED]
[SMTP:[EMAIL PROTECTED]]
        Sent:   Thursday, May 31, 2001 9:21 AM
        To:     [EMAIL PROTECTED]
        Subject:        RE: Alk and pH questions...

        Havent heard of calcium blocks,  what are they,  are they easy to
use and
        control the calcium levels with??

        Steve

        ---------- Original Text ----------

        From: "Shane Clays" <[EMAIL PROTECTED]>, on 5/31/01 9:49 AM:

        Calcium is running about 420-450. I add a pH/alk buffer in a 2
gallon drip
        daily. That keeps my alk up, and then I use Sea Lab calcium blocks
for the
        calcium. That keeps calcium steady at  420-450. I think it has just
been the
        addition of the buffer daily that has caused the alk to rise. I have
noticed
        that it rose slightly from week to week, and would counter that by
skipping
        addition of buffer one day a week (my tank uses about .20 meqs of
alk per
        day). I had recently switched products. I think the new product is a
little
        more effective than the other and thus caused the alk to rise more
than I
        expected. When I did my test this weekend, it was higher than
normal, but my
        calcium was still at 420. Now that the alk has gone down (back down
to 3.6
        over 3 days) my calcium is around 440ish. I have started adding the
buffer
        again, and am watching it to see how fast it causes the alk to rise
back to
        the 4-4.5 meqs level. Since this is acceptable, I am no longer
worried about
        it!

        Thanks,
        Shane

                -----Original Message-----
                From:   [EMAIL PROTECTED]
        [SMTP:[EMAIL PROTECTED]]
                Sent:   Thursday, May 31, 2001 8:31 AM
                To:     [EMAIL PROTECTED]
                Subject:        RE: Alk and pH questions...

                How is your calcium Shane,  if my understanding of water
chem is
        right  a low
                calcium could cause alk to rise. 

                Steve
                ---------- Original Text ----------

                From: "Shane Clays" <[EMAIL PROTECTED]>, on 5/31/01 9:19
AM:

                Thanks. I figured as much, and based that question on the
assumption
        that an
                alk of 4.6 was way to high for a reef tank. Now that I am
not
        concerned
                about that anymore, I have started my normal daily dosage of
pH/alk
        buffer.
                My problem was I thought I needed to bring the alk down, and
I knew
        that
                when I did so, the pH would drop as well, so I wanted to
keep the pH
        up
                while the alk dropped. No worries now though!

                Thanks again,
                Shane C.

                        -----Original Message-----
                        From:   DBW [SMTP:[EMAIL PROTECTED]]
                        Sent:   Wednesday, May 30, 2001 7:18 PM
                        To:     [EMAIL PROTECTED]
                        Subject:        Re: Alk and pH questions...

                        Shane,

                        >Also, are there any good products to help keep pH
up
        without
                affecting the
                        >alk?

                        No such thing.  You mess with one, you mess with the
other
        too.

                        If you are having low pH problems, and have
satisfactory
        alkalinity
                levels,
                        then you should be looking at gas exchange not
adding
        something else
                to
                        "fix" the problem.

                        Catch ya,

                        DBW             | The Caretaker, OZ REEF Marine Park
                        Melbourne       | http://ozreef.org/
                        Australia       | [EMAIL PROTECTED]
                       
               
       
--------------------------------------------------------------------------
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