well don't feel like your alone in that, diet is one of the most confusing, controversial and contradictory topics regarding gliders. Almost all new owners go through it.
Variety is also usually one of the first concerns. For a long time I didn't like the bml diet because it was "so restrictive" on the fruits and veg. I wanted to give them variety and keep it interesting.
What I didn't know was that variety may not necessarily be the best thing for them nutritionally, which is my first priority.
Over time I learned that my gliders thrive on routine, including their food. Even when I was trying to give them a wide variety, the gliders ate the "restricted list" of fruits n veg the best and most consistently. So now, that's what they get. I don't go looking for weird, seasonal, exotic fruits and veg anymore. The primarily like melons, blueberries, cherries so that is mostly what they get with grapes and apples thrown in once in a while as they aren't their favorites. Same with veg, mixed veg, or individual peas, green beans, carrots, corn.
The variety for bml comes from what you serve each night. for example:
Monday- bml, peas, watermelon
tues- bml, mixed veg, apples
weds- bml, green beans, blueberries
thurs- bml, corn, cherries
frid- bml, carrots, honey dew melon
sat- bml, peas, grapes
Sun- bml, mixed veg, cantaloupe
no two days are the same, yet all of the fruits and veg are on the bml list of what to feed.
If your over feeding, often times the gliders actually eat less. Try measuring out the portions of fruits and veg. For Bml I serve 1 tablespoon fruit and 1 tabelspoon veg PER glider ( that is what is suggested for this diet ) . There is usually still a little left on the plate. When I don't measure, and get heavy handed with portions they eat less and I throw more out.
The ratio, omg the ratio about made me pull my hair out
The ratio for bml has already been calculated for you, you don't need to try to figure it out.
I believe ( but not positive ) the same goes for the Critter Love hpw diets. Not all hpw diets are the same. The exotic nutrition hpw is not the same as the Critter love, the critter love has salad mixtures ( fruits and veg ) there are 3 recipes for the salads I believe. This is where the "variety" comes in for this diet.
The ratio simplified
the 2:1 ratio is the "goal" or magic number your striving for.
the first number, no matter what the number is represents Calcium.
the : represents "to"
the second number, no matter what the number is represents phosphorous
so really what you are looking at is this
calcium (2) to (:) Phos (1) = 2:1
Why is this important to understand? the intestines absorb phosphorus more than twice as efficiently as calcium, a higher calcium-phosphorus ratio is desirable in the diet (1.5:1, 1.7:1, and 2:1, which has been found optimal for bone formation in many animal studies).
now if the second number is higher than the first, they are getting far to much phosphorous. But this can be balanced by adding another food with a higher calcium and lower phos content. ( now that you know what the 2:1 ratio stands for you should be able to see which foods are higher in calcium than phosphorous to compare the two foods )
IF you feed two foods with say a 12:5 ratio and a 9:4 ratio ( just an example ) you are giving them to much calcium and it's not balanced either.
Some diets have already done all this for you, some diets don't. Some people try to feed by ratio's, this can quickly become a nightmare. When feeding by ratio's many things aren't factored in, their focus is just the ratio. There are vitamins and minerals that need to be in balance as well. There are other things that affect the bodies usage of vitamins and minerals. Like for example vitamin C, makes the body utilize Iron at a faster rate, for gliders to much iron can be hard on the internal organs. One diet tried to reduce the level of iron, however they added orange juice concentrate with vit c, so now the body may not be getting as much iron but the body is optimized to absorb it at a faster rate. So really, was it beneficial or more harmful ?
Like I said, unless you fully understand what each food and what that food contains is going to do to the body, feeding this way can be a night mare.
It's much more practical to follow a diet that has all of this figured out for you. As long as you are following the recipe exactly as it's written, and serving as directed by that diet creator ...you really can't mess it up.