dominator

Can someone please let me know if I am using too much or too little chemicals for my water..

Cuurently have a 75 gallon tank with the following:
PLANTS

1 NYMPHAEA LOTUS (ZENKERI)
1 CABOMBA CAROLINIANA
1 CRINUM CALAMISTRATUM
2 ALTERNANTHERA REINECKII "LILACINA" PURPLE
2 MICROSORUM PTEROPUS
1 CRYPTOCORYNE WENDTII "GREEN"
2 HYGROPHILA CORYMBOSA "SIAMENSIS 53B"
1 CRYPTOCORYNE PARVA
8 LUDWIGIA REPENS

FISH

2 BOESEMAN'S RANIBOW
1 TURQUOISE RAINBOW
4 RED LINE TORPEDO BARB (ROSELINE SHARK)
2 KOI ANGELFISH
2 PLECO
6 BLUE FLAME COLOMBIAN TETRA
1 REDTAIL SHARK
6 GREEN FIRE TETRA
8 RUMMY NOSE TETRA
6 CHERRY BARBS
2 BLUE RAMS
2 ACARICHTHYS HECKELII

I do now have any CO2 and the lighting consists of 2 x 96 watt (6700) bulbs.

I currently do a 10% water change once a week and add:

Water conditioner for the new water
Bio-Support Liquid
Waste control liquid
Tropica liquid

Am I adding to much or missing something...in reading posts from this forum, I have found a dosing chart from Seachem. Is this chart recommened?