Just got a Hybrid, new to Black/Grey Water tanks, questions.

May I just add that RV toilot paper is a proven myth. Not helpful just costly. Also IMHO black tank additives to reduce smell are also not needed. If you smell toilot there is a seal compromise somewhere. A flush kit is a great accessory. Flush black first. Gray will rinse. Do not trust guages. They lie like politicians. We have had our Bantam for sixteen years. Treated us pretty well. Owners book not required. Most RV's are about the same. PM me is you have specific troubles