Some areas have hard water which will cause deposits to appear on the felt.
Also excessive lime will raise the pH to intolerable levels for most plants.
Use the parts below to make a water filter refill set up that you can use to top off your tanks.
10 in. Taste, Odor and Scale Inline Water Filter
Here’s one that will work well. Removes limescale and chlorine.
1/4 in. O.D. x 0.170 in. I.D. x 25 ft. Polyethylene Tubing
Here’s poly tubing really cheap. But really long. This should fit right into the filter above without any fittings.
3/4″ Female Hose Adapter Valve 1/4″ Compression
This will connect your water source to your poly tubing.
Faucet to Garden Hose Adapter
You’ll need an adapter for the sink faucet or have a plumber install a hose spigot nearby.
Quick Connect 1/4 in. Plastic Straight Valve
You’ll also need a valve at the filling end to turn it off.