War maps are easy ways to get constant crystals. They eat them 20 at a time, and everytime they eat, they drop a crystal. Tested on 8 gacha's, 4 eating war maps, 4 eating stone. All max level. The ones eating war maps were putting crystals everytime they ate, ones eating stone took a few times each crystal.
CRAZY GOOD organic poly hack: Find one that can make organic polymer.. Keep it separate from others and store unopened crystals in a bin, no spoil timer! You can keep hundreds on hand at all times. Updog so others can see
When raising a baby gacha, fill their inventory with stacks rare mushrooms. They don't prefer them over other foods, but they will eat them if they have to and each mushroom regains alot of food. This will keep them from starving. This is really easy on aberration. They will still drain your berry troughs, but this will give you peace of mind when you've got other things to do. "UP" if this helps at all.
Gachas are essentially living lootboxes and resource farms. They will eat anything (including stone, wood, or fiber) and turb it into crystals which can drop a variety of resources including black Pearl's, organic polymer, or obsidian, among other things. They also have a rare chance to drop higher-tier crystals which turn into upgraded armor and tools