I've been using Equilibrium for a long time in my planted tank, but recently realised that it perhaps isn't the best thing to use in my new nano shrimp tank due to the high TDS it gives (all good stuff for a planted tank, but perhaps just too much stuff
in there for shrimp). The tap water here in Singapore is quite soft (3-4 dGH and 1-2 dKH) with a TDS of ~ 140, so I would prefer to just boost the GH and KH a little, rather than having the expense of using RO. Hence knowing the corresponding increases in KH and TDS for each remineralising product is quite important!
So looking for alternatives and found NeoTiger GH+/KH+ in my LFS which looked ideal, but just doesn't seem to work as it should (see this thread
). For shrimp, SaltyShrimp products seem most people's minerals of choice, so just waiting for my Bee Shrimp Minerals
to arrive from the US...
But in looking for alternatives, it seemed that there was very little info available regarding what TDS each product gives for a certain GH. Only SaltyShrimp seem to give this info freely, Seachem support bizarrely say they have no TDS data available for Equilibrium, Replenish or the Aquavitro products. Even the GH / KH ratio isn't always obvious.
So wondering if the collective brain of this forum might help to compile a comparison list to make it clear what increase in KH and TDS might be expected for a 1 dGH increase in hardness?
Here's what I have so far. The results in black are my own measurements, those in light grey are manufacturers figures. Could you help fill in the blanks please?
The figures show have all been corrected to show:
- the amount of product that needs to be added to 10l of water to increase the dGH by one unit (+1 dGH)
- the corresponding increase in KH and TDS per +1 dGH increase in hardness.
Interesting to see how the TDS figures compare: Seems SaltyShrimp Sulawesi 8.5 minerals are the "cleanest" at about 16ppm TDS per +1dGH / +0.78gKH, but I thought 1dh ~ 18ppm TDS so how is this possible? Equilibrium seems the "dirtiest" in terms of adding 38ppm TDS per 1dGH hardness. Note that clean / dirty does not mean good / bad, just crude terminology which hopefully helps explain differences between products.
You can then multiply up the figures to determine the amount of product to add for your required GH, and the corresponding KH and TDS levels that will result (i.e. multiply the KH and TDS figures by how many dGH you require to get the actual KH and TDS you will obtain).
If you can help fill in the blanks (including adding other products), can you please post:
1) Product brand and name
2) How much of the product (grams or ml) you added and to how much water
3) The starting GH, KH and TDS of the water (if not using distilled / RO and they weren't zero)
4) The resulting GH, KH and TDS measurements
I'll then add this to my spreadsheet, calculate the necessary figures, then update the table above.
Does that make sense? Hopefully others might find this data useful too?
Kind regards, James