crs shrimp parameter

Hey all, Tank Info: 70 L (approx 20gal) 20 PRL shrimp (no deaths since put in the tank) Lighting period 8 hours heavily planted Substrate ADA Amazonia Light Filtration is a canister and two sponge filters RO water remineralised with salty shrimp Gh+ Ammonia, Nitrate, Nitrite - tested and all...

Okay so I've been swayed to get the AdA soil (thanks everyone for the help!) and I will be purchasing the new ada amazonia soon but I've read that it lowers your water GH, is that true? My gh is already pretty low. Can anyone also tell me what it will do to my water parameter? I want to know if...