What's new
By:
Filters

Increasing water hardness

malfunction

malfunction

Fishaholic
Joined
Dec 28, 2013
Messages
492
Reaction score
125
Location
GB
So, I’m getting two new tanks soon and am thinking about setting up one as an all male peacock tank. My water’s soft (1-2dH KH; 4-5dH GH), so I’m thinking about raising the hardness. Normally I stay clear of meddling with parameters, but I’m thinking of making an exception. Does anyone have any recommendations on the safest and most consistent ways of raising hardness? I’ve come across Epsom salts and bicarbonate of soda a few times - would be great to know how effective this is.
Thanks
 
You need to increase the calcium (primarily) and magnesium. Epsom salt is only the latter (plus sulphur). Bicarbonate of soda is a temporary buffering but that is not going to increase the GH.

You can use a calcareous sand sold for rift lake cichlid tanks; I did this back in the 1980's when I had a tank of livebearers and one of rifdt lake cichlids, since my source water was zero GH/KH and 5 or lower in pH. You can also use rift lake cichlid salts; these are mineral salts, not sodium (common salt). You need to prepare the water used in all water changes outside the aquarium if you use these salts.
 
PheonixKingZ said:
Crushed coral or cuttlebone is the most “natural” way to do it.
Click to expand...
Ok, thanks. Do they into the filter? Or into the substrate? Also, I usually do 50% water changes each week - does this mean I’ll get swings in pH every time I do a water change?
 
Byron said:
You need to increase the calcium (primarily) and magnesium. Epsom salt is only the latter (plus sulphur). Bicarbonate of soda is a temporary buffering but that is not going to increase the GH.

You can use a calcareous sand sold for rift lake cichlid tanks; I did this back in the 1980's when I had a tank of livebearers and one of rifdt lake cichlids, since my source water was zero GH/KH and 5 or lower in pH. You can also use rift lake cichlid salts; these are mineral salts, not sodium (common salt). You need to prepare the water used in all water changes outside the aquarium if you use these salts.
Click to expand...
Thanks…so I take it GH is more important to rift cichlids than KH? Would combining Epsom salts and calcareous sand work? That seems like the most straight forward combination to me. I’m slightly wary of using the premade cichlid salts as I think the cost will rack up fairly quickly
 
malfunction said:
Thanks…so I take it GH is more important to rift cichlids than KH? Would combining Epsom salts and calcareous sand work? That seems like the most straight forward combination to me. I’m slightly wary of using the premade cichlid salts as I think the cost will rack up fairly quickly
Click to expand...

GH is crucial to all fish, both those that must have the minerals in the water in order for their physiology to function (rift lake cichlids for example) and those soft-water species that do not require these minerals and will be slowly killed depending upon the level and the species.

Coral is calcium, Epsom is magnesium. But there are other minerals involved. Also, with both coral and magnesium, it would not be easy to measure each...GH will increase with either, but together, by how much? And which one? If you intend additives, use the right one to avoid risking the fish. The cichlid salts can be measured accurately.

The rift lake sand is a permanent change. Calcium and magnesium (and whatever else) is slowly dissolved for years. Carribsea make some, they say they last for the life of the aquarium. Here's the link; you will note they have different sands for different species/lakes.

Marine Substrates - CaribSea

ARAG-ALIVE!™ ARAGONITE CORALINE™ OCEAN DIRECT™ AQUACULTURE GRAVEL ARAG-ALIVE!™You can now bring the world’s most exotic reefs into your home with CaribSea’s Arag-Alive!™ substrates. Eight environmentally accurate ecoscapes, developed through CaribSea’s cooperation with public aquariums and...
caribsea.com caribsea.com
 
WhistlingBadger said:
Seachem makes an additive called "cichlid salt" that is easy to use and has a balance of minerals. I used it for my rainbowfish.
Click to expand...
Yeah, I saw this…I normally like seachem stuff but they’re so overpriced. I’m wondering if doing a 250l water change will become costly in time.
 
Byron said:
GH is crucial to all fish, both those that must have the minerals in the water in order for their physiology to function (rift lake cichlids for example) and those soft-water species that do not require these minerals and will be slowly killed depending upon the level and the species.

Coral is calcium, Epsom is magnesium. But there are other minerals involved. Also, with both coral and magnesium, it would not be easy to measure each...GH will increase with either, but together, by how much? And which one? If you intend additives, use the right one to avoid risking the fish. The cichlid salts can be measured accurately.

The rift lake sand is a permanent change. Calcium and magnesium (and whatever else) is slowly dissolved for years. Carribsea make some, they say they last for the life of the aquarium. Here's the link; you will note they have different sands for different species/lakes.

Marine Substrates - CaribSea

ARAG-ALIVE!™ ARAGONITE CORALINE™ OCEAN DIRECT™ AQUACULTURE GRAVEL ARAG-ALIVE!™You can now bring the world’s most exotic reefs into your home with CaribSea’s Arag-Alive!™ substrates. Eight environmentally accurate ecoscapes, developed through CaribSea’s cooperation with public aquariums and...
caribsea.com caribsea.com
Click to expand...
Yeah, fair point. I guess a homemade combination is likely to be less consistent. I’ll have a look at the caribsea sand. Could be a nice and easy fix
 
So, thinking this through… if I used a calcareous substrate, like caribsea, that’ll release enough minerals to keep my water hard. However, there’ll probably be fluctuations every time I do a water change. Is this where bicarbonate of soda comes in? Would it’s buffering effect stop my ph and hardness fluctuating every time I do a water change?
 
Bicarbonate of soda (aka baking soda) will only increase KH. Bicarbonate of soda contains only sodium and carbonate. GH (hardness) is calcium and magnesium so bicarb will have no effect on GH.
 
malfunction said:
So, thinking this through… if I used a calcareous substrate, like caribsea, that’ll release enough minerals to keep my water hard. However, there’ll probably be fluctuations every time I do a water change. Is this where bicarbonate of soda comes in? Would it’s buffering effect stop my ph and hardness fluctuating every time I do a water change?
Click to expand...

Bicarbonate of soda should not be used long term. It is at best temporary, and it is not the sort of thing you need here. EDIT: @Essjay posted in the interim and mentioned what I was forgetting. I do remember an article by Dr. Stan Weitzman on soft water fish and he mentioned that bicarbonate is not or should not be used long-term as a buffering.

As for the fluctuation, you would have to do it and see. Once a tank's biological system is established, the system tends to remain fairly stable. Smaller volume water changes might be necessary. I last did this back in the 1980's but other members are likely dealing with this now, they may be better able to advise on specifics.
 
ok, thanks guys. I’ll probably just the sand first to see how well it works. If that does the job, then no need to play around with anything else
 
You must log in or register to reply here.

Similar threads

R
Stocking Advice - Medium (?) Hardness
Replies
5
Views
289
Colin_T
Colin_T
PackardG00SE
I think the Water Department screwed up my aquarium.
Replies
9
Views
438
MaloK
MaloK
L
Water hardness question
2
Replies
19
Views
1K
Lcc86
L
Blanchedalmond
Low hardness but high pH?
Replies
12
Views
561
Blanchedalmond
Blanchedalmond
JackGulley
Pygmy Corys in Hard Water?
2 3 4
Replies
45
Views
2K
TwoTankAmin
TwoTankAmin

Most reactions

Useful Links

Back
Top