Cloudy Water

I had a bad case of carpet algae and the water started to get a green
tint and thought I had an algae bloom. I covered the tank completely
for 3 days and did a water change - crystal clear for a day or so.
Now the cloudiness has turned to more of a milky white (bacterial
bloom???).

54 gallon corner tank
10-20 small-large Julidochromis marlieri
3 Clown Plecos
Many caves of slate
30% planted
Aquaclear 300 running 2 sponges
Tank has been around for 7+ years

1) I did have to bleach my log to rid of carpet algae, but rinsed very
well
2) Rinsed sponges and added a 3rd
3) Feeding sparingly 4-5 times/week
4) All water parameters are 0 - high ph and hardness (thus the reason
for cichlids)
5) Recently removed 7 large leilupis
6) Added several new plants

Suggestions?