Originally Posted by Cattitude
I use pure rooibos (red) tea. It is naturally caffeine-free. You can get it at most major grocery chains. It's excellent for healing fin damage and the fish seem more "perky".
Soak a tea bag in the tank until the water is a medium-yellow-red colour. Here's a pic of one of my tanks as a guide.
if you're going to put a teabag in the tank make sure you put in in roughly the same amount of water and the same soaking time. it will drop the PH the longer its in there. i went through this with my green DT. i put the IAL in a 1g milk jug and every WC i put in the concertrated IAL water in varying amounts. some times i used 1/4 to 3/4 of the gallon jug. the result was a PH ranging from 7.4 to 6.4 after a WC. his fins couldnt get used to the wild fluctuations.
i settled for 800ml of IAL water for the 3.4 and 2,5g tanks each water change and the PH fluctuations have been controlled. now the most i seem to get is around .4 difference before and after a wc. the ph before i put the fish in the new water is pretty close to 7.2 on a consitent basis. you can use a empty milk jug to make the tea bags last longer and control the amount you put in each wc.