Discuss all aspects of freshwater tropical fish and aquariums.


Postby Miggy » Fri Nov 24, 2017 1:32 pm

How can we understand what each of the h numbers mean on a test kit for my tropical tank I have just set up, to tell what is the right numbers.
Posts: 26
Joined: Sat Jan 05, 2013 9:13 am

Re: Testing

Postby Carylnz » Sat Nov 25, 2017 10:30 pm

Do you mean the pH numbers? This tells you how alkaline or acidic the aquarium water is. Some fish, like African cichlids, prefer alkaline water while a lot of others, like tetras, prefer it a little acidic.
7 is neutral (test water will be pale green), below 7 is acidic (and test water colour will be yellowish) and alkaline water, above 7, goes blue.
Most common community fish will be fine in water anywhere between 6.8 - 7.4 in my experience.
Remember though, it is better to have fish happily living in a pH slightly above or below what they prefer than to use chemicals (often called pH Up or pH Down) to alter it as this can create pH swings which the fish really don't like!
If your water is too alkaline, lots of plants, some bogwood and/or peat added my raise it enough.
If your water is too acidic, add some limestone gravel chips.
My home forum is The NZ Fishroom http://www.fnzas.org.nz
User avatar
Posts: 7484
Joined: Thu Jun 14, 2007 7:37 pm
Location: Blenheim, NZ

Return to Freshwater Discussion

Who is online

Users browsing this forum: No registered users and 1 guest