D-D Marco Coralline Rock – ReefSaver 18kg
D-D Marco Coralline Rock – ReefSaver is a totally natural calcium carbonate rock that is now supplied in a coloured form, using a new proprietary paint-free process developed to simulate coralline covered live rock. The purple coralline colour allows your new reef structure to look natural and established immediately, whilst waiting for the surface to be colonised by real coralline algae.
Features
- Ancient reef rock, formed by nature.
- Totally natural, not man-made from sand and mortar in regular shapes.
- Paint-Free coralline algae colour, blends immediately into your tank.
- Calcium carbonate – buffers your aquarium water.
- Perfect porous structure for colonisation of beneficial bacteria.
| Specification | Value |
|---|---|
| Weight | 18kg |
| Material | Calcium carbonate |
| Colour | Purple coralline |
| Form | Natural rock, porous structure |
FAQ
Is the coralline colour safe for marine life?
Yes, the colour is paint-free and made using a natural process, so it is safe for marine life and does not leach harmful substances.
How long does it take for real coralline algae to colonize the surface?
Colonization time varies depending on tank conditions, but it typically takes several weeks to months for real coralline algae to establish on the surface.
Can this rock be used in both saltwater and freshwater tanks?
Please contact customer service

Leonard MacLeod –
The rock looks very natural right after adding it to the tank. The purple hue blends well with the existing reef. It’s porous and has helped maintain stable water parameters. I’ve noticed beneficial bacteria settling in the rock after a few weeks.
Maria Avery –
Great product for creating a realistic reef look. The paint-free colour is a big plus. It’s durable and doesn’t seem to break down easily. I’m still waiting for real algae to grow, but the structure is solid.
Gabrielle Lee –
I’ve used this in my 120-gallon reef tank. The calcium carbonate helps buffer pH, and the porous surface supports bacterial growth. It looks like a mature reef from day one.