0.5ft Shrimp tank water become murky..

[edshrimp]

i posted in begineer sub forum, i just saw this and thought would be more appopriate to post here..

my 4months old tank water are a little bit yellowish now, after i put in more shrimp, from 5 to now 13 shrimps in it, you can see the different between the water color and the white A4 paper background.
I did 10-20% water changes alternate days (for past 1 week), and it still come to the same color..
I read some about 'bacteria bloom', is it what i am facing now?
what causes it? too much shrimp food?
how can i get my water become clear again?

if i turn off the light, cover the whole tank without light for 2-3 days, will it helps? will my plant get affected without light for 2-3days?
Thank you!

shrimp1.jpg

my 4 months old 0.5 ft tank with 1 pigmydory and 13 shrimps..

[Urban Aquaria]

Bacterial bloom is possible, but its usually a clear cloudiness... with such a small tank, the yellowish tint could also be due to the tannins being released by the soil or organic matter rotting, which is probably enough to tint the small volume of water. More water changes should help remove the tint. The cloudiness should gradually clear up once the bacteria bloom runs out of organic waste to consume, water changes and reduce feeding may help too.

Quite likely the ammonia, nitrite or nitrate levels are building up in the tank, so do add fast growing plants to soak up the excess nutrients.