Aquarium water, which make of water care products?

[O Him]

I have a new set up, 125 ltr tank (Juwel Rio) I have been given different advice by the many sales people in my local aquatic shop, each one recommends a different make of water treatments, either API (stress coat/zyme) or JBL (denitrol) or Nutrafin (Cycle). all I want is good conditions for my fish. I have a Nutrafin test kit and after 10 days the readings are: Ph 7;5........ NH 3 / NH 4. 0;6...... NO 3. 20........NO 2. 0;3. I have 5 Guppies(male) and after 4 days all looks well with them. Should I stick with just one make of treatments ie, Nutrafin Cycle etc. or is it ok to use different makes, if so will this affect the test results. I have about 10 plants in the tank, some are doing well but others are looking a little like me, a little run down and going a sort of brown(ie) colour, they don't look as though they will last much longer. Thank you in advance for any advice and I apologise for the length of this question.
Please simple answers, me not to good in the brain cell dept :-(
ps my looks are past the caring/help days :-)

[Marcus]

Interpet is as good as anything and better than some, especially price wise.

http://www.ketteringkoi.com/acatalog/Interpet_Aquarium_Treatments.html

[Emma W]

i used nutrafin cycle to cycle my tank..
and i use tetra aqua safe to dichlornate water..
plants trim down the dead looking ones sometimes this helps..
dont think its the products your using..

[Vicki356]

I would reccommend that you ask this question on www.practicalfishkeeping.co.uk it is a really good website for all fish keeping. There are experts there waiting to answer your questions now! Good luck x