If your old style works well & you want to conserve on water just keep adding a brich at a time to the tank till it doesn't do a good job then back up a brich or 2.

Here's a song perfectly seated for this thread (in the DT)

I'M GLAD I'M WORKING DOWN BELOW
(Words & Music by John M Garrett)

Oh a sewerman am I and my trade I deftly ply
As underneath the city streets I go
And my hope for paradise is to wade up to my thighs
Oh I'm glad I'm working down below

CHORUS:
Down below, down below
Oh it's dark but it's home to me, you know
It's the only place, I find, I can get some peace of mind
Yes I'm glad I'm working down below

There are rules to the trade that have to be obeyed
And every movement must be made just so
You must watch just where you stand, and just where you put your hand
Still I'm glad I'm working down below

There was cause for alarm at a nearby sewage farm
When a man fell down a pit some years ago
Since the accident occurred he's been lying there interred
Oh I'm glad I'm working down below

Oh in Paris I have found they take tourists underground
And even charge a small fee for the show
While in Venice I've heard tell they sail boats on it as well
Oh I'm glad I'm working down below

Oh it is a wonderful life, you can hide here from your wife
And leave behind your every care and woe
I may be a sewer rat, but I'm not to be sniffed at
Oh I'm glad I'm working down below

Barry