pH and water hardness in central americans

[menelaos]

The more i resach these fish the more i dont want them (just kidding).
I got some newbe questions
I do not have a tank yet i am just resaching for the near future.

In central american cichlids how much does the change in pH effect them, what should they be, and how do i change them.

Plus i know they like harder water how do i change my water type.

when it comes to cycaling your tank, witch is better a few fish to start the cycle or add ammonia with out fish.

I just need to know how big of an effect these have on the cichlids i want.(jack dempsy,green terror, convicts) If any one can help me i would appreciate it thanks....

[Lisachromis]

The first question we really ought to know is what is your water like? You may be worrying over something you don't need to change.

[menelaos]

i am not sure how should i check it

[Lisachromis]

If you have a local petstore they may be able to test a sample that you bring in. If you can, find out the pH and hardness level. Another option is to contact your local water supplier and ask them.

[menelaos]

i am gona check. I wanted a 125gal tank(dempseys,cons,etc...maby a green terror)
i am gona use fake plants but wonderd what would be the effects if i added 1 small floating plant(i dont know the types)
would it be benifitsal to my fish, the tanks pH, ammonium,nitrate, and water hardness etc... for these kind of fish of will it mess things up. plus will a floating plant get out of control and grow large in my tank
i thank everyone for there help..........