Ok been giving a long hard thought on black water , my tank volume is 500l I would like mild to moderate tannins so Iām assuming Iād have a ph drop from 6.5 to around 4.5-5 , I have multiple questions , my stock is no doubt suited so no worries there but to gain that initial black water with a ph shock is a curiosity, I change 50% weekly so 250l would the water changes just dilute the tannins so they never are in effect and if not how do I keep water changes to the same ph , my tap water is 6.5-7 and I donāt want to chemically dose , thirdly best choices of foliage to start the tanning process , also if I add these leaves , bark or what ever to my filter would that be an option rather than loitering the substrate with debris , I know a sump would be ideal just load the sump and done but anybody doing black water in a similar situation