Not quite sure how much a 1/4 tsp of alk is, as alk is measured in Meq, dkh or ppm and the potency of supplements can vary significantly.
Anyway, those evels are fine, albeit a tad high for alk imho. Personally, I would recommend the following:
Cease the addition of additional alkalinity supplements and simply carry on with kalk in top off water.
Measure today, give it four days, measure again and see if there has been a decline in alk. We are only really concerned with Alkalinity, as your calcium is linked, as you will see in the article I link below.
Depending on where levels are, I suspect they wont be much lower than they currently are, but if they around the 8-9 mark for alkalinity, I would not raise them, I would simply focus on keeping them there.
The value by which they dropped, devided by four, is your daily consumption shortfall of kalk.
Now start dosing to keep the levels stable, follow the instructions on the products you are using, and dose Alkalinity & Calcium supplements in a balanced ratio, i.e. get an additional Ca supplement, do not only dose alk and Mg supplements.
For every 1Milli equivalent (2.8 Dkh) of Alk added, you want to add 20ppm of calcium.
Alternitavely, you can try and increase the evaporation rate and consequent addition of CaOH(kalk) (a balanced Ca-Alk supplement in itself) by adding a fan over sump / tank or, you can increase the potency of your kalkwasser mix by "spiking your top up water with vinegar. You might find this usefull:
http://www.reefcentral.com/forums/showthread.php?t=1821167
http://www.reefscapes.net/articles/breefcase/kalkwasser.html
To work out how much of your additional Ca and Alk supplements to use to maintain levels in the unlikely event of kalk having a shortfall at this stage, Here is a calculator that you might find useful:
http://reef.diesyst.com/chemcalc/chemcalc.html
Save it nonetheless, you might need it once the sps start growing exponentially
And a bit of reading to digest:
http://reefkeeping.com/issues/2004-12/rhf/index.php
http://www.advancedaquarist.com/2002/11/chemistry
But seriously, don't worry too much about chasing numbers, focus on maintaining stability over and above all else.
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