Sludge Reducer

Sludge Reducer
Product No. 16736
Find a Store In Stock

Look no further for how to remove pond sludge!

Sludge Reducer blocks brake down unslightly sludge awhile helping boost pond's biological filtration level. Ideal when setting up new ponds and during fall winterizing and spring start-up. Beneficial bacteria and enzyme blend helps balance the pond's biological needs, resulting in cleaner, clearer water.

This product comes in the following sizes 4 ct, 16 oz and 40 oz.
Sludge Reducer is rated 3.0 out of 5 by 2.
Rated 5 out of 5 by from Worked perfectly 2 year old, small outdoor pond, about 75 gallon. Went from very cloudy to crystal clear in a week. Koi are zooming around having a ball now that they can see! I hadn't even known there were black ones in there...1 month so far, all is well. Will be dropping next pellet in tomorrow. Their behavior has been very consistent for the 2 years. Hope nothing bad happens. so sorry the other reviewer had a disaster, I wonder what the difference was?
Date published: 2016-08-14
Rated 1 out of 5 by from added to my pond, killed all my fish over night, 6 years same set up, only thing i changed was the tetra sludge reducer. added to my pond, killed all my fish over night, 6 years same set up, only thing i changed was the tetra sludge reducer.
Date published: 2015-05-24
  • y_2017, m_11, d_22, h_8
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_16736, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_tetrafish

How do I get SDS forms for your products. We have some of your products here. Sludge Reducer-16398-900,UPC 04679816398 5,Aqua Rem Water Clarifier, WL #16397, UPC-04679816397 8, Koi Vital, WL 16395, UPC 04679816395 4, Aqua Safe ,WL 16267, -UPC 04679816267

Asked by: Rose S
Email techsupport.tetra-fish@spectrumbrands.com so the Care Team will have your email address to send them to. BREX
Answered by: BREX
Date published: 2017-08-29

My pond was cleaned thoroughly and a month later I cant see the fish . It is in the sun i have plants in there . Started with pond block 4 with my 1000 gal. A week later for sludge remover blocks and I do have barley pellets at the waterfall. No impovemen

Asked by: LouiseAW
Cleaning the pond completely means removing all of the biological filter and it has to re-establish one. Also, Pond Block should not be used with live plants so the plants probably are not doing much at this point. Test your water quality to see what is off, and add a bacterial supplement/treatment. You don't mention any equipment such as filters or UV lights, etc. You may need to add some of these to help clear the pond. BREX
Answered by: BREX
Date published: 2017-07-28

Product says one block for each 250 gallons of water, since I have small pond and around 80-100 gallons of water do I use half a block. Thanks

Asked by: trapper
You would use about 1/4-1/3 if you can cut it into that size. Always better to under dose something like this, then over dose. BREX
Answered by: BREX
Date published: 2017-06-27

Can you use this product in a pond with fish and with existing algae?

Asked by: Lise
Yes, that's fine. It helps to break down sludge, it does not help remove algae. BREX
Answered by: BREX
Date published: 2017-06-21

How many gallons does a packet treat ?

Asked by: koizilla keeper
One package treats a 1000 gallon pond. BREX
Answered by: BREX
Date published: 2017-05-11

Q1: Where do we place it, inside the pond? Q2: we have a pump & filter system outside the pond... Will it help with the clearing of sludge from the tank where the filters are, or should I place a block there as well?

Asked by: giorgio92
Yes, it goes directly into the bottom of the pond. No, it will not help remove the sludge from your filter systems. That has to be manually removed. BREX
Answered by: BREX
Date published: 2017-05-05

How frequently does one use this.

Asked by: Dale Hagen
Generally, once a month. If the water is really soft, however, you may find it dissolves more quickly. In this case, do a partial water change, and if it is still soft, buffer the water with baking soda or pond salt. BREX
Answered by: BREX
Date published: 2016-06-23

will my plecostomus be OK with this?

I assume if turtles and koi are fine, plecs will be too, but just want to make sure Dyson the plec who never loses suction will be OK.
Asked by: breakdj
Yes, Dyson the plec who never loses suction should be just fine, :-). BREX
Answered by: BREX
Date published: 2015-01-07
  • y_2017, m_11, d_22, h_8CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_8
  • loc_en_US, sid_16736, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_tetrafish