Troubleshooting
Gay's Pondweed problems — and how to fix them
Gay's Pondweed (Potamogeton gayi) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Sparse, etiolated stems
Low light causes thin, widely-spaced leaves and weak stems. Increase PAR to at least 35 at the substrate and consider CO2 supplementation.
Algae on stems and leaves
In high-nutrient conditions, algae colonises the leaves. Reduce excess nutrients, maintain stable CO2, and introduce algae-eating fish.
Melting in very warm water
Above 28°C this plant declines. Best suited to cooler or temperate aquariums; avoid pairing with high-temperature tropical species.
Root disturbance melt
Sensitive to being uprooted. Handle carefully when rearranging; plants may temporarily melt and regrow from the stem nodes.
Nutrient deficiency (yellowing)
Yellowing leaves indicate nitrogen or iron shortage. Check and balance fertilisation; ensure root tab coverage if using inert substrate.
Prevent gay's pondweed problems before they start
Most gay's pondweed issues are care-mismatch, not bad luck. Dial in the basics:
Gay's Pondweed problems — FAQ
Why is my gay's pondweed sparse, etiolated stems?
Low light causes thin, widely-spaced leaves and weak stems. Increase PAR to at least 35 at the substrate and consider CO2 supplementation.
Why is my gay's pondweed algae on stems and leaves?
In high-nutrient conditions, algae colonises the leaves. Reduce excess nutrients, maintain stable CO2, and introduce algae-eating fish.
Why is my gay's pondweed melting in very warm water?
Above 28°C this plant declines. Best suited to cooler or temperate aquariums; avoid pairing with high-temperature tropical species.
Why is my gay's pondweed root disturbance melt?
Sensitive to being uprooted. Handle carefully when rearranging; plants may temporarily melt and regrow from the stem nodes.
Why is my gay's pondweed nutrient deficiency (yellowing)?
Yellowing leaves indicate nitrogen or iron shortage. Check and balance fertilisation; ensure root tab coverage if using inert substrate.