win Posted February 27, 2015 Report Share Posted February 27, 2015 Do you measure Tds often? how much does it cost for a machine? What is average Tds for tap water , rain water, bottle water? My CRS, CBS eggs kept dropping off and I got no idea about my Tds in caloundra area. Is the shrimp soil is a must to put in for CRS,CBS or any gravel is ok? Thanks in advancce Link to comment Share on other sites More sharing options...
BRISSY Posted February 27, 2015 Report Share Posted February 27, 2015 I usually measure it before a water top up. A TDS metre costs $10-30 off ebay. Tank water TDS is usually below 10 but can be way above that. Tap water, depends on the area. Can be anywhere from 120-450+. Mine is 350 here at the moment, but I just use tank water (TDS 2-3) so it doesn't affect me. If your tap water has a high TDS then you can get an RO or RODI filtering system, which will bring the TDS to 0-10 depending on type/quality. You don't need shrimp soil but it is very handy. If you can't get shrimp soil, inert substrates are the next best thing. I got a spare TDS pen here, pm me and I'm sure I can work something out. Link to comment Share on other sites More sharing options...
