Intermixed broken concrete from construction sites will work just as effectively as various sizes of natural rocks. Contact some local concrete contractors for sources of waste concrete materials. Some might deliver it for free rather than pay to dispose of it. Lengthy sections of concrete pieces lining shoreline provide excellent habitat for spawning and refuge areas of FHM.
Edited by Esshup:
If adding the broken concrete, try to get pieces without rebar or mesh in them, that metal sticking out of the concrete is a fish line catching monster, and if anyone were to fall on that it's much more dangerous than falling on plain broken concrete.
Be aware that in fertile nutrient rich ponds filamentous algae can at times swamp all types of underwater structure. The FA masses flourish and die back based on season, water temperatures, and nutrient fluctuations. FA in itself serves as structure / habitat and allows production of lots of natural tiny foods such as invertebrates utilized by small fish.
Last edited by esshup; 01/11/22 11:51 AM. Reason: added info
