I am not sure exactly what advice you need.... For just straight out general advice we need to know more about your tank.
Without a little more info, it is pretty difficult to give good advice If you have anymore specific questions, please feel free to post.
OK, here goes...
I got advice on my set up from a reputable dealer, who really discussed my situation and what I wanted out of a beginner setup. His recommendations tracked those David E. Boruchowitz's "Simple Guide to Freshwater Aquariums" pretty well. I've got a 20-gal
. glass tank, 24wx16hx12d.
I set up six days ago, adding Cycle and Prime to establish the tank according to directions, but my filter stopped working (gravel particle in the impeller, I think). I got the filter working again and added 5 serpae tetra on Friday evening (day five) and fed them Saturday evening (a very little bit of Sera GVG-mix -- flke/freeze-dried).
Penguin BIO-Wheel 170 power filter (combination of carbon/polyfiber filter pad and BIO-Wheel)
temp -- The submersible heater is set for 77 degrees F, but the temp is 80 degrees F. right now. (I just added 25% new water. It was apparently a bit warm.)
ammonia, nitrite --
The BIO-Wheel is supposted to "eliminate toxic ammonia and nitrite on contact." I don't have a test kit for either of these. Should I?
how often are water changes preformed --
I was told that water changes of 1/3 of the tank every two weeks is fine, but I'm wondering. My tap water pH is 7.5. I tested the pH this morning at 4:00 a.m. (I'm having trouble getting used to the sound of "running water" outside my bedroom door!) and it was 5.0. Changing out about 25% of the water (adding one drop of Prime per gallon of new water) brought the pH up to 7.0. What might cause the pH change from Monday to Saturday?
anything else you do to the tank --
I have a "rock" air bubbler, standard light hood/tank cover that came with the tank.
Community stocking --
I know the rule is 20 inches max of one-inch young fish for a new 20-gallon tank (not all at once). Will that be too many once they're fully grown? And what would be good fish to add to the serpae tetras? I'm looking for an attractive balance of color, size, and strata, and enough hardiness to tolerate this aquari-fry.
Thanks for any help you can give.