Extreme water hardness an issue for any plants or shrimp?
I just set up a tank with miracle grow and pool filter sand in a 20 gallon long tank. I neglected to wash the sand. I thought it was clean for some reason. The tank is just holding some plants till I finish making MTS. It has light but no filter or fish. I will add water from my established tank along the way to keep the plants fed. I will also add some shrimp is the water tests okay.
Anyway after many water changes the test strip dipped says that I have extreme water hardness. The little square is golden yellow, off the charts in hardness. The kit shows that a dark orange is 350.
The strip says:
GH: golden yellow, off the chart
KH: somewhere between 180 and 300
PH: 7.5... was 8.4 but I just added PHdown (I know now that it is bad to use, causes algae. I followed the instructions and it jumped it down more that it said it would.)
Should I do another water change to get the PHdown out?
Is the water hardness an issue?
Can I put shrimp in?
When the water is okay I was going to add in old tank water with vacuumed up fish matter from the gravel.
Thanks so much,