my fan direct blow to water can get me 25~27 day&night..no bulky heatsink.

just top up water.

my tank keep on growing BBA, will it be filter dirty..Im using 2 sponge filter and it has not been change since very very long ago, almost reaching 1yr.

usually i just use toothbrush and scrub it.

usermode: im using eheim HOB, it come with 1 carbon filter + 1 sponge filter, I also used substrat pro in it too, I dont think my water is dirty..but some how I able to kill some BBA with excel, but new BBA is coming back..

proX selling that product is expensive..just thinking to rescape again, boring with current scape already..

usermode: BBA appear randomly after I had kill some with excel. Will trim all those infected.

ProX: using cylinder type CO2, 16litre nano tank at 1BPS. I will relocate the diffuser to test. maybe filter out flow discrupt CO2 absorption. My water flow will direct hit the bubble and tiny CO2 bubble will scattered around

looking for HC, anyone have extra?