Hard or soft water

Essjay

Moderator
Staff member
Moderator
Global Moderator
Joined
Nov 28, 2006
Messages
14,907
Reaction score
10,523
Location
Teesside, UK
It was determined earlier in the thread that you have soft water. Platies and guppies need hard water. Danios are good for soft water.

Those numbers look like pH and this is not a measure of hardness.
 

fishyfun&fans

Fishaholic
Joined
Sep 29, 2021
Messages
603
Reaction score
353
Location
Humberside
Hard water over soft water I love the taste of lime/chalk stone and chlorimine....not sure it’s so good for a tank though....depends what you keep
 
Last edited:

Byron

Fish Guru
Tank of the Month!
Joined
Feb 25, 2009
Messages
16,275
Reaction score
7,795
Location
CA
Can I still keep them together?

So far there has been no actual number for the GH, just subjective terms like "soft" which surprisingly can mean different things to different people. Can you get the GH number?

Livebearers must have moderately hard (or harder) water. Danios are soft water species but some can do well in moderately hard water. When we have the actual GH we will be better able to advise.
 
OP
L

Lamie

Fish Fanatic
Joined
Oct 5, 2021
Messages
156
Reaction score
43
Location
New Zealand
So far there has been no actual number for the GH, just subjective terms like "soft" which surprisingly can mean different things to different people. Can you get the GH number?

Livebearers must have moderately hard (or harder) water. Danios are soft water species but some can do well in moderately hard water. When we have the actual GH we will be better able to advise.
He did some calculations as my area as it is supplied by four treatment plants.


The KH and GH vary so averaging the data the results fall within the 0-4 dGH/dKH zone, around 2 usually for both. Which is soft/very soft water in terms of hardness.

He advised buying a test kit though. I can go to my lfs and ask I guess
 

Byron

Fish Guru
Tank of the Month!
Joined
Feb 25, 2009
Messages
16,275
Reaction score
7,795
Location
CA
He did some calculations as my area as it is supplied by four treatment plants.


The KH and GH vary so averaging the data the results fall within the 0-4 dGH/dKH zone, around 2 usually for both. Which is soft/very soft water in terms of hardness.

He advised buying a test kit though. I can go to my lfs and ask I guess

You really won't need a test for GH and KH unless you do decide to adjust the parameters. Assuming the 2-4 dH is at least close, this is way too soft for livebearers. You want GH around 10 dH absolute minimum, and 12-15 dH if mollies are included, but 10 dH minimu7m is OK for platies and guppies, but in the 12-15 dH range would not hurt them. There really is no upward limit when it comes to livebearers though extremes are not advisable. I don't know the danio species, but if this is the common Zebra, it will be OK with the 10-15 dH range.

Increasing GH can be achieved by using a calcareous substrate sand/gravel, or mineral salt mix such s those for rift lake cichlids. This is not common salt (sodium chloride) which has nothing to do with GH. Water for water changes must be prepared outside the aquarium. All of this is added work and cost, but that is your decision. With such soft water, you would have a much easier time with species suited to soft water.

The pH will obviously increase with the rise in GH (and KH). That again is fine for the fish mentioned. Just recognize that pH alone is not the real issue, it is the GH. Livebearers must have dissolved calcium and magnesium in the water which enters the fish via osmosis through the cells and this is necessary for the correct functioning of their internal physiology.
 
OP
L

Lamie

Fish Fanatic
Joined
Oct 5, 2021
Messages
156
Reaction score
43
Location
New Zealand
You really won't need a test for GH and KH unless you do decide to adjust the parameters. Assuming the 2-4 dH is at least close, this is way too soft for livebearers. You want GH around 10 dH absolute minimum, and 12-15 dH if mollies are included, but 10 dH minimu7m is OK for platies and guppies, but in the 12-15 dH range would not hurt them. There really is no upward limit when it comes to livebearers though extremes are not advisable. I don't know the danio species, but if this is the common Zebra, it will be OK with the 10-15 dH range.

Increasing GH can be achieved by using a calcareous substrate sand/gravel, or mineral salt mix such s those for rift lake cichlids. This is not common salt (sodium chloride) which has nothing to do with GH. Water for water changes must be prepared outside the aquarium. All of this is added work and cost, but that is your decision. With such soft water, you would have a much easier time with species suited to soft water.

The pH will obviously increase with the rise in GH (and KH). That again is fine for the fish mentioned. Just recognize that pH alone is not the real issue, it is the GH. Livebearers must have dissolved calcium and magnesium in the water which enters the fish via osmosis through the cells and this is necessary for the correct functioning of their internal physiology.
Thank you very much.
 

Most reactions

Top