Can I have too high KH?

Question

I am about to stock my fish tank, as it has just completed its cycle. I tested the water and the KH is 300 or above (the test stops at 300). I know you want a high KH to keep the waters pH stable but is this too high?

Also, I have GH of 75 (Soft) ... I want it to be around the low 200s. How can I raise this...if I can even do that? And is it strange that I have very high KH and fairly low GH?

Answer 1

Your water source must have tons of calcium in it. One thing is for sure,short of R/O equipment you are going to have to live with it.
Things that will go well: African Cichlids--Almost all Live-bearers---- Central American Cichlids----- Making up Marine water(salt water should be good quality)--
Things that will be hard to do------ Change pH-------Grow most plants--- Keep Amazon fish(unless you want to get a R/O(reverse osmosis) system)-----
My point is,that if you can learn to work with this water it can be a great benefit, choose fish and plants that will thrive in your water and it will serve you well. Try to keep plants or fish that don't do well in your water and it will be very difficult to change.

Answer 2

I have also have really hard water. My alkalinity and hardness test at 300 and that is also the max for my test results. My pH is always at 7.8 so that could be the reason for my consistant pH levels. Anyway it all depends on what type of fish you are going to get. I have malawi cichlids and they love hard water and high pH, but I know that a lot of other fish prefer softer water levels. Before you get the fish just ask someone there what kind of water conditions the fish like. Also just a tip that I should have followed... get just a couple of fish until your new tank completely cycles which will take about a month. This way it will reduce the fish loss and keep the ammonia and nitrite levels from spiking to fast and resulting in fish loss. Hope this helps you out.