| Hi Nico maybe you want to try them sometime. In momotaro farm they use sweet potatoes, pumpkin, tofu, etc too. Some hobbyists use refresh for calcium but I think tofu is more effective. Refresh will bring up my water GH & TDS level tofu won't.
Does hobbyists in Germany use salt in their pond? Some of our local guys do that but I don't because in my opinion if a certain level of salt is kept in the pond all the time then parasite & anerobic bacteria will start to build resistance to the salt level & it will become more diffcult to deal with when a problem break up in the pond.
SF
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