These are the mediums in canister filter

Just replace a new canister filter few days ago, all are back to normal. At the same time, replace some mediums. Yes of course, the beneficial bacterial is a must in the canister filter to convert toxic Ammonia to Nitrate as fertilizer. Diagram above showing how I place the mediums layer by layer.
1. Top layer with JBL Symec to collect any dirts from the tank.

2. Layer 2 using ADA Bio Rio provides the ideal home for a long term and stable colonization of bacteria and maintain the conditions of aquarium water.

3. Layer 3 with JBL PhosEx Plus binds excess phosphates quickly and reliably without releasing them again, to prevent any algae bloom.

4. Bottom layer is bamboo charcoal to absorb unnecessary substances, excess nutrients and to improve the clarity of water. Its porous surface provides good water circulation thereby prevents clogging and provides home for bacteria colonization.

Algae Treatment & Prevention

Type of algae	Cause	Solution
Black Beard Algae (BBA)	Low CO2	Add CO2, trim, spot treat with Excel
Blue Green Algae (BGA)	Low nitrate	Blackout + add nitrate
Cladophora	Low nitrate + Low CO2	Add nitrate, add CO2
Diatoms	Excess silicates, Low light	Wait, add catfish, use RO water/sponge
Green Dust Algae (GDA)	Spores	Wait out life cycle, remove + WC
Green Spot Algae (GSA)	Low phosphate + Low CO2?	Add phosphate, possibly add more CO2
Green Water (GW)	Ammonia + high light	Reduce light, Wait, Small WC, UV filter
Hair Algae	Excess nutrients, silicates	WC, Excel, feed less, is something limited?
Hydra	Stowaway in live food	Use cleaner live food, flubendazole, H2O2
Milky Water	Bacteria bloom	Wait out, protect filter, add fish slowly
Staghorn	Ammonia + low CO2	Remove, WC, protect filter, Excel
String Algae	Excess nutrients	WC + get biofilter working

Canister Filter K.O.!

After 2 and half years of using the canister filter, finally the motor is dead, the whole eco-system in the tank has stopped, need a replacement motor to prevent any problems arise.

Planning to rescape the tank

I was a bit busy recently and the aquatic tank lack of caring cause some univited friends, they are "Algae-". At the moment sourcing and gather some suitable stones for the next scape. Roughly has an idea how to do it and the plan is still under developement. Perhaps some fishes will add back to the tank in the future.