150ppm nitrate is CRAZY. I'd say that's your problem. Even for plants that like nitrates, that's a lot. Test your tap water for nitrates, see if it's high. Also, how old is the nitrate test?
If I did have a too high level of TDS, how would I lower it cheaply?
Calcium and magnesium are nutrients just like the other stuff. In lower light settings your water source may have enough of them that you do not need to add anymore. In high light setups you're going to burn through them more quickly so it is something to check on if all other nutrient levels are accounted for.
150ppm nitrate is CRAZY. I'd say that's your problem. Even for plants that like nitrates, that's a lot. Test your tap water for nitrates, see if it's high. Also, how old is the nitrate test?
150ppm nitrate is CRAZY. I'd say that's your problem. Even for plants that like nitrates, that's a lot. Test your tap water for nitrates, see if it's high. Also, how old is the nitrate test?
Aside from TDS, you can also just look at general hardness and carbonate hardness. Tonina belem is a softwater plant that prefers very soft water and and very acidic water. Most people I know grow it in peat, or a very acidic substrate. Some even use blackwater.
I don't see how 150 ppm of nitrate could be accurate. I don't think fish would even survive. I think it would also affect other plants than just the Tonina.
RO water. Or peat filtered water
Tonina likes a pH of 6 or less. 5 would be even better
Thats true generally speaking, but most Toninas and Eriocaulons are blackwater plants and have evolved to grow under conditions where calcium and magnesium are non existent. They are not particularly fast growers either