Hi!
I'm glad that Lightning is fine and the vet visit went well.
1. Calcium supplements - can be any (more or less known) brand. Rep-Cal is told to be the best. I give mine Arcadia EarthPro at the moment. A tiny pinch twice a week is enough for a tortoise on a varied diet with other supplements. Crushed egg shells can be used instead of calcium powder. Some food options also have high calcium contents (silverside fish, black soldier fly larvae, isopods, opuntia cactus pads, egg with shell etc.)
2. Out of two products recommended by your vet I would settle on Mazuri LS, as a source of additional plant fiber. Other options are ZooMed Grassland pellets or Arcadia Optimized52 Tortoise Food. Tortoise Herbal Hay from TortoiseSupply or Tortoise Food Fixer from Kapidolo Farms are other good high-fiber additions to diet (perhaps, better even, as these are pure dried plant matter without additives). I should warn that rare redfoot enjoys high-fiber foods - it takes patience to introduce. Foods containing pure timothy hay are not the best - usually it's too stemmy (even for sulcatas).
3. 4 to 6 inches of substrate is usually enough to keep high humidity once enclosure is properly sealed and heated. If you can mix lower and upper layers of substrate and pack it down again - this will also help.
I'm glad that Lightning is fine and the vet visit went well.
1. Calcium supplements - can be any (more or less known) brand. Rep-Cal is told to be the best. I give mine Arcadia EarthPro at the moment. A tiny pinch twice a week is enough for a tortoise on a varied diet with other supplements. Crushed egg shells can be used instead of calcium powder. Some food options also have high calcium contents (silverside fish, black soldier fly larvae, isopods, opuntia cactus pads, egg with shell etc.)
2. Out of two products recommended by your vet I would settle on Mazuri LS, as a source of additional plant fiber. Other options are ZooMed Grassland pellets or Arcadia Optimized52 Tortoise Food. Tortoise Herbal Hay from TortoiseSupply or Tortoise Food Fixer from Kapidolo Farms are other good high-fiber additions to diet (perhaps, better even, as these are pure dried plant matter without additives). I should warn that rare redfoot enjoys high-fiber foods - it takes patience to introduce. Foods containing pure timothy hay are not the best - usually it's too stemmy (even for sulcatas).
3. 4 to 6 inches of substrate is usually enough to keep high humidity once enclosure is properly sealed and heated. If you can mix lower and upper layers of substrate and pack it down again - this will also help.