Cichlid fry grow in water that their own feeding keeps fouling, because frequent meals and fast growth load a small tank with waste between changes. The routine that protects growth is little and often: replace 10 to 15 percent of the water four times a week, always with water matched for temperature and chemistry, always added slowly. Small changes hold conditions almost level, so fry spend their energy growing instead of recovering from a swing, and the rhythm below keeps every change in the same safe order.
Preparing replacement water that matches
Prepare the replacement water before touching the tank, in the same order every time. Fill a clean bucket with the measured amount, treat it as your main tank requires, and bring it to the tank's temperature so a hand in each body of water feels no difference. Match chemistry as closely as your usual testing allows, especially when your tap water and tank water differ, because fry notice a sudden shift in hardness or acidity more than a slow drift. Let the prepared water stand beside the tank while you siphon, so nothing about the change is rushed and no cold or untreated water ever goes in straight from the tap.
Siphoning without drawing fry in
Work the siphon at the end of the tank away from where the fry gather, and keep suction gentle enough that a curious fry can swim clear of it. A covered intake, or plain airline tubing used as a thin siphon, slows the draw and makes fry far less likely to be pulled in than a wide gravel tube. Move slowly along the bottom, lifting waste and uneaten food from corners and from around any sponge filter, and stop at the planned amount rather than chasing the last speck. Fry follow disturbance at first, so pause and let the group drift away before restarting near a new patch.
Checking the bucket before it is emptied
Treat every bucket as holding fry until inspection proves otherwise, because small fry pass through a siphon almost invisibly and settle in the bucket's waste. Hold the bucket against the light and watch for specks that move against the current when the water is swirled gently. Net or cup any fry you find and return each one to the tank in a little of the bucket water before the bucket goes anywhere near a drain. This single pause is the step hurried changes skip, and it is the step that quietly decides whether a routine grows fry or loses a few at every clean.
Adding water back and holding the rhythm
Pour or drip the matched water in slowly, ideally over several minutes and away from the fry group, so the tank's temperature and chemistry barely move during the refill. Watch the fry for a minute afterwards: normal behaviour is a quick scatter, then feeding and exploring as before. Keep the four-times-a-week pattern on fixed days that suit your household, note the amount and any fry found in the bucket each time, and resist enlarging the changes when the water looks cloudy, because a large correction swings the very conditions the routine holds steady. Across a week, steady growth, eager feeding at every meal and clear water between changes tell you the rhythm suits the batch, while fry that hide and refuse food after refills point to water that was not matched closely enough. The shared schedule in KinsLe under Care Teams shows who holds each change that week and records completion for the next person.