Thread: Brick / Decorative Facing Block Cleaner recommendations

Originally Posted by RS2OOO

Sodium Hypochlorite did the job with ease.

Masked up all the composite decking and brushed it on as 50/50 with water using a thick soft bristled fence painting brush, left for 10 minutes and jet washed off.

Still have the back half of pond to do and only did the coping stones up to where the covers sit so now they are half black and half clean. My plan for this to avoid contamination into the pond will be to put t-towels in the solution and lay them on the coping before drying off with a towel, then jetwashing the dried residue the next day.

Before (Had already tried the right half with vinegar and household bleach):




After:





Before:





After, and it looks a completely different colour:

Thats a cracking job mate, it looks like new!
how much do you reckon you'll use to do it all?

Think i'll have a go at some of my block paving with algae on it.
I looked on amazon they do 10 ltrs for £16.
And can always use it to clean the hot tub after winter

Off subject slightly. Does anyone know if it would be safe to use Sodium Hypochlorite to clean rocks from a tropical fish tank providing they were rinsed thoroughly.

Originally Posted by Brian C

Off subject slightly. Does anyone know if it would be safe to use Sodium Hypochlorite to clean rocks from a tropical fish tank providing they were rinsed thoroughly.

Household bleach should be sufficient for that.

I used to clean fish tank rocks in bleach, rinse thoroughly, them soak in tap water for an hour, then let them fully dry out before returning to the tank. Never had any problems.

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Thanks for the replies regarding cleaning the rocks in my tank, I will try using bleach.

Originally Posted by Brian C

Thanks for the replies regarding cleaning the rocks in my tank, I will try using bleach.

i use bleach to clean my recycle RO prefilters, then rinse and soak in cleanwater with good dose of sodium thiosulphate dechlorinator, in as it helps neutralise any chlorine that soaks in.