No need for a TDS
meter it only measures total disolved solids... Could be bad or good TDS
, so no need to get a TDS
for tap water. PO4
and nitrate are the 2 things you need to look for with cyno, PO4
beign the #1 problem. Not all PO4
can be measured with the test kits we use. If you have cyno you have some PO4
in the tank to feed it, you may not be able to detect it with the kits we use. Old bulbs can also help cyno grow as well as low flow.
is the best thing you could get for the tank. There is no way your tap water could be as pure as ro
check your tap water for PO4
that would be my first step, if you have any at all then you should look into a ro
Siphon out the cyno when you do your water changes, so not blow it areound the tank that only helps in spreading it... Good luck.