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Hey SKF peoples, I'm just mixing up my RO water with a combination of GH+ and GH/KH+ to keep tiger shrimps in. And I thought I'd share my experience, I gradually added the minerals and measured pH along the way and I thought I'd share the results. I note that the pH may change overnight after letting stand but I have been running a pump in the water to mix it well and aerate it so I doubt there will actually be any measurable shift. As you can see by the results, the GH/KH+ pushed up the pH a LOT! Does anyone else have this experience? I have achieved my desired water parameters in terms of ppm and GH/KH however the pH is unreal.. and this is not the first time this has happened to me either. However t is the first time I have taken the effort to document the fact. I'm planning on experimenting with adding a very shallow layer of the cal aqua labs black earth premium and monitoring the pH over the course of days.. expecting it to slowly drop... Any input is 100% welcome! love n peace will PS the initial drop in pH after adding the first lot of GH+ I understand can be explained (as I have read elsewhere) that when attempting to measure the pH of RO water using a pH meter the device can not accurately produce any result due to the lack of ions/conductivity in the water. 27/05/2016 EC meter HM TDS-3 pH meter pH APIkit KH GH At time of water mixing EC0 ppm0 fresh RO 6.6 after adding 50ppm GH+ 6.3 after adding 30ppm GH/KH 7 after adding 25ppm GH/KH 7.5 after adding 45ppm GH/KH EC300 8.3 after adding 17ppm GH/KH EC333 ppm175 8.3 7.8 3 8

I posted this in another forum topic (it was a little off track) so I thought this is worth a discussion in itself. An example, I have a 60L TB tank that runs at approximately 150TDS. If I was to take out 10-15% (9 litres) of water and change this with RO water how much salty shrimp should I use with the new RO water to maintain 150TDS in the tank. Reason I ask this is I have heard people mix salty shrimp to a TDS of 150 in the new RO water of say 9 litres and when dripping it back in they get a huge swing in TDS readings. This would obviously lead to a much higher TDS when the water change has been added and severely stress the shrimp? Do we have a guideline for how much salty shrimp you should add in to meet current tank TDS?