I've been using the same old bag of peat moss since starting the hobby. But last week it ran out just before I got in an order of Plants...
So based on advice seen on this forum I went out and got Shamrock branded peat, but I now think I've done something wrong, like get the wrong bag or something.
My plants arrived in the post this morning and were all potted up and stuck in a terrarium with high humidity (instead of using a bag) and they all got top watered. But out of curiosity I checked the TDS of the water that collected in the bottom of the terrarium and it had gone from 7ppm to 62p