Choose the task and amount
Write down the job: removing debris, a planned water change, glass cleaning or filter service. These need not all be done together. Use your existing care plan and measurements to choose an amount; this page does not prescribe a percentage or calendar.
The water-change calculator turns your chosen percentage into water volume and container trips. It cannot establish whether that amount addresses a water-quality problem.
Prepare before water comes out
- Clear a route for the container or hose and secure the receiving end.
- Check the siphon and container for damage or contamination; follow their instructions.
- Prepare replacement water using the applicable conditioner label and care plan.
- Identify the equipment that must be disconnected before the water level changes.
A conditioner is a specific product with specific directions, not an interchangeable dose. Compare water preparation products and follow the bottle you actually own.
Isolate and clean according to the model
For a heater, follow its unplugging and cooling instructions before exposing or moving it. Keep electrical connections dry and accessible. Follow the filter’s valve, opening and media-cleaning sequence rather than applying a household cleaning method to every part.
The filter maintenance guide leads to exact-model procedures. Keep the distinction between cleaning a mechanical pad, servicing an impeller and replacing biological media. Do not infer that every medium needs replacement because the filter is open.
Refill, reassemble and observe
Bring the water to the equipment’s permitted operating level, check connections, and follow the specified reassembly and restart sequence. Observe the return flow and check for drips at the lid, valves and hoses before leaving the tank.
If flow fails to return, noise changes or a leak appears, use the symptom checks. Do not keep restarting damaged equipment. Note what work was done and any water tests in your own log so a later change has context.
Cleaning is not disinfection
Equipment moved between tanks can carry pathogens. UF/IFAS distinguishes ordinary maintenance from disinfection and advises methods appropriate to the system and organism. For used equipment or suspected disease, get a qualified sanitation plan and check material compatibility with the maker; this guide supplies no chemical recipe.
See the used-equipment inspection checklist before reusing parts with an unknown history.